Turrero , A. - Academia.edu (original) (raw)
Papers by Turrero , A.
Children with Attention-Deficit Disorder, predominantly inattentive type (ADD-I), have many diffi... more Children with Attention-Deficit Disorder, predominantly inattentive type (ADD-I), have many difficulties in bottom-up pattern processing. Few studies in children with ADD-I have paid attention to early neurobiological components of Event-Related Potential (ERP), like the P100, which is associated with initial bottom-up attentional processing. The aim of the study was to examine the P100 during visual frequent stimuli and evaluated the results once the sensoriomotor bottom-up program, known as HERVAT, was complete. HERVAT stands for hydration, balance, breathing, ocular motility, hearing and touch. The present study utilized an experimental design via pre-test and post-test in three groups (ADD-I with HERVAT, ADD-I without HERVAT and control group). We recorded the results pre-test and post-test for P100, Intelligence Quotient (IQ) and attention. We found that ADD-I + HERVAT group have a P100 latency close to the control group, as well as an increased in IQ, attention and parietal ac...
New diagnostic criteria for Alzheimer&amp... more New diagnostic criteria for Alzheimer's disease (AD) stress the role of in vivo biomarkers. Neurophysiological markers are usually not considered as such criteria, although theoretical and practical reasons would justify them. In order to assess the value of neurophysiology as an AD biomarker, whole-head magnetoencephalographic (MEG) resting state recordings were obtained from 35 AD patients, 23 mild cognitive impairment (MCI) patients, and 24 healthy controls. The AD group was further split into two groups differing in severity according to the GDS/FAST criteria. A Minimum Norm Estimation procedure was utilized to estimate the cortical origin of slow brain oscillatory activity in the delta band (2-4 Hz). Eight regions of interest (ROIs) discriminated between AD patients and controls. Delta current density (DCD) in all ROIs showed a significant negative correlation with cognitive status (p < 0.001). DCD values in posterior parietal, occipital, prerolandic, and precuneus cortices distinguished reliably between MCI patients, AD patients with different severity scores, and controls. Importantly, an increase of DCD in right parietal cortex and precuneus indexed the transition from MCI to mild dementia and from mild to more severe dementia. MEG delta mapping might be a serious candidate for a "neural…
British Journal of Radiology, 2004
A study was undertaken to assess the quality of general chest CT examinations for indication of l... more A study was undertaken to assess the quality of general chest CT examinations for indication of lung carcinoma according to the criteria proposed in the European Commission (EC) Guidelines, and to investigate their usefulness in the optimization of this practice. The criteria were evaluated for a sample of 100 examinations from five radiology departments in the Madrid area featuring single slice helical CT scanners with special emphasis on radiation dose and image quality. To determine the degree of compliance with the image criteria considered, the examinations were independently evaluated twice by five radiologists from the participating centres. A subsequent selection of the observers was made according to the consistency and independence of their readings. Dose measurements carried out in parallel supplied data to estimate the values of the CT dose indices (CTDI), dose-length product (DLP) and effective dose (E). The results show good compliance with the image criteria used - between 93% and 98% on average at the different sites, with variable degrees of internal deviation. 10 out of a total of 16 criteria proposed in the EC guidelines were met by practically all the examinations in the sample. The average weighted CTDI (CTDI(w)) values per site were in the range of 13-19 mGy; those of DLP were between 263 mGy cm and 577 mGy cm, and those of effective dose between 4 mSv and 9 mSv. The highest mean DLP value was below but close to the reference value proposed in the EC Document (650 mGy cm). In general, a weak correlation or no correlation at all was found between image quality scores and patient dose (DLP).
Archives of Neurology, 2006
Background: Subjects with mild cognitive impairment (MCI) are at a higher risk of experiencing Al... more Background: Subjects with mild cognitive impairment (MCI) are at a higher risk of experiencing Alzheimer disease (AD). Magnetoencephalographic temporoparietal dipole densities of low-frequency activity are good predictors of individuals' cognitive status, and might be a useful tool to investigate the conversion from MCI to AD. Objective: To investigate the role of low-frequency dipole densities as predictors of the risk of developing AD. Design: Whole-head magnetoencephalographic recordings were obtained from 19 probable AD patients, 17 MCI patients, and 17 healthy control subjects. The generators of focal magnetic slow waves were located using a single moving dipole model. Results: Left parietal ␦ dipole density permitted a reliable classification of AD and MCI patients. The MCI patients were divided into 2 groups based on the median left parietal ␦ dipole density, and were followed up for 2 years. The estimated relative risk of conversion to AD was increased by 350% in those MCI patients with high left parietal ␦ dipole density scores. Conclusions: Results confirmed the important role of parietal ␦ dipole density in the evaluation of AD and MCI. A magnetoencephalographic-based assessment of AD and MCI patients might be considered a useful clinical test in the near future.
Alzheimer's & Dementia, 2006
Background: Subjects with mild cognitive impairment (MCI) are at higher risk of suffering from Al... more Background: Subjects with mild cognitive impairment (MCI) are at higher risk of suffering from Alzheimer's disease (AD). Previous investigation (Fernández et al, 2002; 2003; 2005) demonstrated that MEG temporoparietal dipole densities of low-frequency activity are good predictors of individuals' cognitive status, and might be a useful tool to investigate the conversion from MCI to AD. Objective(s): We investigated the role of low-frequency dipole densities as predictors of risk of developing AD. Methods: Whole-head magnetoencephalographic recordings were obtained from 19 probable AD patients, 17 MCI patients, and 17 healthy control subjects. The generators of focal magnetic slow waves were located employing a single moving dipole model. Results: Left parietal delta dipole density (LPD) permitted a reliable classification of AD and MCI patients (sensitivity was 0.737, specificity 0.765, and total classification accuracy was 75.0%), while right occipital dipole density permitted a reliable classification of MCI patients and controls (sensitivity was 0.706, specificity 0.882, and total classification accuracy was 79.4%). Once LPD was confirmed as a reliable variable for the classification of AD and MCI patients a follow-up study was performed. The 17 MCI patients were followed for two years, with a clinical evaluation every 6 months; no loss to follow-up occurred. The cohort was divided into two groups based on a median split of the LPD measure: MCI-High, and MCI-Low. The two groups of MCI patients did not differ in terms of age or MMS score at baseline. After two years 5/17 patients (29.41%) met criteria for Probable AD. MMSE scores were significantly (pϭ0.042) reduced (8.8 Ϯ 7.01 points) in the converter group from baseline. Four of the 8 (50%) MCI-High patients developed AD, while only 1 out of 9 (11%) MCI-Low patients converted to dementia (RR ϭ 4.5, 95% CI ϭ .86-28.3). The estimated relative risk of conversion to AD was increased by 350% in those MCI patients with high LPD scores (MCI-High group). Conclusions: Results confirmed the important role of parietal delta dipole density in the evaluation of AD and MCI. A MEG-based assessment of AD and MCI patients might be considered a useful clinical test in the near future.
Journal of Clinical Neurophysiology, 2004
Conventional visual analysis and dipole density analysis of magnetoencephalographic data for both... more Conventional visual analysis and dipole density analysis of magnetoencephalographic data for both spike and low-frequency magnetic activity were compared for presurgical evaluation in temporal lobe epilepsy (TLE) in a sample of 26 drug-resistant operated TLE patients. A series of logistic regression analyses were performed. Dipole density sensitivity was superior to visual localization analysis. Three separated logistic models were calculated for interictal spikes, low-frequency magnetic activity, and the combination of both measures. A combined interictal spike/low-frequency magnetic activity model predicted correctly the operated temporal lobe in all patients. Clear-cut criteria for the probability model are proposed that are valid for 92.3% of cases in the sample. The quantitative approach proposed by this study is an evidence-based model for presurgical evaluation of temporal lobe epilepsy, which improves previous magnetoencephalographic investigations and establishes working clinical criteria for patient evaluation in TLE.
Estadistica Espanola, 1988
Alzheimer Disease & Associated Disorders, 2010
Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma... more Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma 1 L M MORÁN, MD,
Radiologia, 2006
OBJECTIVES Our objective was to apply quality criteria proposed by the European Commission (EC) G... more OBJECTIVES Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines to the brain CT examinations for cerebrovascular accident (CVA) diagnosis at single-slice spiral CT scanners from five different hospitals in the Madrid area. MATERIAL AND METHODS A sample of 100 brain CT examinations was collected and independently reviewed by five radiologists, to determine the degree of fulfilment of image quality criteria. Dose measurements were performed to estimate the values of the CT dose indexes (CTDIw, CTDIair), the dose length product (DLP), and the effective dose (E). RESULTS Once the McNemar test was applied to the sample, the number of observers' readings was reduced to three. The quality criteria were, in general, fulfilled, since mean values of image quality score between 80% and 92% were deduced, with variation coefficients per centre in the range of 0.07-0.1. However, both visualization criteria 1.1.2 and 1.1.3 exhibited similar ranges of ...
Methods of Psychological …, 2001
The performance of students in speech intelligibility tests is influenced by individual character... more The performance of students in speech intelligibility tests is influenced by individual characteristics such as sex and age, personality factors such as neuroticism (N), extraversion, attention and sensitivity to noise, and environmental conditions such as the location of the scholars in the classroom (LI), the location of the classroom itself with regard to extraneous noise (LO) and background noise (BN). The first aim of this study was to analyse the role of these factors in predicting performance. From a mathematical point of view the problem was to establish a model to reflect accurately the relationship between the expected proportion of successes and a set of covariates. We used a logistic regression model mainly because of its high mathematical flexibility. A further aim was to study in depth methodological questions such as the choice and assessment of the model, including its extension to a random-effects model. One hundred and seventy students participated in the study. The results indicate that only four of the factors studied had any significant bearing upon their performance: N, LI, BN and LO, and that the effect of the classroom on performance was a random one. The covariate pattern corresponding to the best performance is given by the following levels : (N) high, (LI) front row, (LO) playground and (BN) normal. For this pattern the estimated proportion of successes is 0.66.
Methods of Psychological …, 2001
The performance of students in speech intelligibility tests is influenced by individual character... more The performance of students in speech intelligibility tests is influenced by individual characteristics such as sex and age, personality factors such as neuroticism (N), extraversion, attention and sensitivity to noise, and environmental conditions such as the location of the scholars in the classroom (LI), the location of the classroom itself with regard to extraneous noise (LO) and background noise (BN). The first aim of this study was to analyse the role of these factors in predicting performance. From a mathematical point of view the problem was to establish a model to reflect accurately the relationship between the expected proportion of successes and a set of covariates. We used a logistic regression model mainly because of its high mathematical flexibility. A further aim was to study in depth methodological questions such as the choice and assessment of the model, including its extension to a random-effects model. One hundred and seventy students participated in the study. The results indicate that only four of the factors studied had any significant bearing upon their performance: N, LI, BN and LO, and that the effect of the classroom on performance was a random one. The covariate pattern corresponding to the best performance is given by the following levels : (N) high, (LI) front row, (LO) playground and (BN) normal. For this pattern the estimated proportion of successes is 0.66.
Radiología
Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines t... more Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines to the brain CT examinations for cerebrovascular accident (CVA) diagnosis at single-slice spiral CT scanners from five different hospitals in the Madrid area. A sample of 100 brain CT examinations was collected and independently reviewed by five radiologists, to determine the degree of fulfilment of image quality criteria. Dose measurements were performed to estimate the values of the CT dose indexes (CTDIw, CTDIair), the dose length product (DLP), and the effective dose (E). Once the McNemar test was applied to the sample, the number of observers' readings was reduced to three. The quality criteria were, in general, fulfilled, since mean values of image quality score between 80% and 92% were deduced, with variation coefficients per centre in the range of 0.07-0.1. However, both visualization criteria 1.1.2 and 1.1.3 exhibited similar ranges of fulfilment (38% - 94%). The good complia...
Radiología, 2004
... Nieves Gómez-Leóna • Ricardo Rodríguez-Gonzálezb,c • Alfonso Calzado-Canterab • Ángel Arenas ... more ... Nieves Gómez-Leóna • Ricardo Rodríguez-Gonzálezb,c • Alfonso Calzado-Canterab • Ángel Arenas de Pablod • Alfredo Cuevas-Ibáñeze • Begoña García-Castañof • Luz María Morán-Blancog • Pilar Morán-Pencob • Agustín Turrero-Noguésh aServicio de Radiodiagnóstico. ...
Trabajos de Estadistica, 1989
Children with Attention-Deficit Disorder, predominantly inattentive type (ADD-I), have many diffi... more Children with Attention-Deficit Disorder, predominantly inattentive type (ADD-I), have many difficulties in bottom-up pattern processing. Few studies in children with ADD-I have paid attention to early neurobiological components of Event-Related Potential (ERP), like the P100, which is associated with initial bottom-up attentional processing. The aim of the study was to examine the P100 during visual frequent stimuli and evaluated the results once the sensoriomotor bottom-up program, known as HERVAT, was complete. HERVAT stands for hydration, balance, breathing, ocular motility, hearing and touch. The present study utilized an experimental design via pre-test and post-test in three groups (ADD-I with HERVAT, ADD-I without HERVAT and control group). We recorded the results pre-test and post-test for P100, Intelligence Quotient (IQ) and attention. We found that ADD-I + HERVAT group have a P100 latency close to the control group, as well as an increased in IQ, attention and parietal ac...
New diagnostic criteria for Alzheimer&amp... more New diagnostic criteria for Alzheimer's disease (AD) stress the role of in vivo biomarkers. Neurophysiological markers are usually not considered as such criteria, although theoretical and practical reasons would justify them. In order to assess the value of neurophysiology as an AD biomarker, whole-head magnetoencephalographic (MEG) resting state recordings were obtained from 35 AD patients, 23 mild cognitive impairment (MCI) patients, and 24 healthy controls. The AD group was further split into two groups differing in severity according to the GDS/FAST criteria. A Minimum Norm Estimation procedure was utilized to estimate the cortical origin of slow brain oscillatory activity in the delta band (2-4 Hz). Eight regions of interest (ROIs) discriminated between AD patients and controls. Delta current density (DCD) in all ROIs showed a significant negative correlation with cognitive status (p < 0.001). DCD values in posterior parietal, occipital, prerolandic, and precuneus cortices distinguished reliably between MCI patients, AD patients with different severity scores, and controls. Importantly, an increase of DCD in right parietal cortex and precuneus indexed the transition from MCI to mild dementia and from mild to more severe dementia. MEG delta mapping might be a serious candidate for a "neural…
British Journal of Radiology, 2004
A study was undertaken to assess the quality of general chest CT examinations for indication of l... more A study was undertaken to assess the quality of general chest CT examinations for indication of lung carcinoma according to the criteria proposed in the European Commission (EC) Guidelines, and to investigate their usefulness in the optimization of this practice. The criteria were evaluated for a sample of 100 examinations from five radiology departments in the Madrid area featuring single slice helical CT scanners with special emphasis on radiation dose and image quality. To determine the degree of compliance with the image criteria considered, the examinations were independently evaluated twice by five radiologists from the participating centres. A subsequent selection of the observers was made according to the consistency and independence of their readings. Dose measurements carried out in parallel supplied data to estimate the values of the CT dose indices (CTDI), dose-length product (DLP) and effective dose (E). The results show good compliance with the image criteria used - between 93% and 98% on average at the different sites, with variable degrees of internal deviation. 10 out of a total of 16 criteria proposed in the EC guidelines were met by practically all the examinations in the sample. The average weighted CTDI (CTDI(w)) values per site were in the range of 13-19 mGy; those of DLP were between 263 mGy cm and 577 mGy cm, and those of effective dose between 4 mSv and 9 mSv. The highest mean DLP value was below but close to the reference value proposed in the EC Document (650 mGy cm). In general, a weak correlation or no correlation at all was found between image quality scores and patient dose (DLP).
Archives of Neurology, 2006
Background: Subjects with mild cognitive impairment (MCI) are at a higher risk of experiencing Al... more Background: Subjects with mild cognitive impairment (MCI) are at a higher risk of experiencing Alzheimer disease (AD). Magnetoencephalographic temporoparietal dipole densities of low-frequency activity are good predictors of individuals' cognitive status, and might be a useful tool to investigate the conversion from MCI to AD. Objective: To investigate the role of low-frequency dipole densities as predictors of the risk of developing AD. Design: Whole-head magnetoencephalographic recordings were obtained from 19 probable AD patients, 17 MCI patients, and 17 healthy control subjects. The generators of focal magnetic slow waves were located using a single moving dipole model. Results: Left parietal ␦ dipole density permitted a reliable classification of AD and MCI patients. The MCI patients were divided into 2 groups based on the median left parietal ␦ dipole density, and were followed up for 2 years. The estimated relative risk of conversion to AD was increased by 350% in those MCI patients with high left parietal ␦ dipole density scores. Conclusions: Results confirmed the important role of parietal ␦ dipole density in the evaluation of AD and MCI. A magnetoencephalographic-based assessment of AD and MCI patients might be considered a useful clinical test in the near future.
Alzheimer's & Dementia, 2006
Background: Subjects with mild cognitive impairment (MCI) are at higher risk of suffering from Al... more Background: Subjects with mild cognitive impairment (MCI) are at higher risk of suffering from Alzheimer's disease (AD). Previous investigation (Fernández et al, 2002; 2003; 2005) demonstrated that MEG temporoparietal dipole densities of low-frequency activity are good predictors of individuals' cognitive status, and might be a useful tool to investigate the conversion from MCI to AD. Objective(s): We investigated the role of low-frequency dipole densities as predictors of risk of developing AD. Methods: Whole-head magnetoencephalographic recordings were obtained from 19 probable AD patients, 17 MCI patients, and 17 healthy control subjects. The generators of focal magnetic slow waves were located employing a single moving dipole model. Results: Left parietal delta dipole density (LPD) permitted a reliable classification of AD and MCI patients (sensitivity was 0.737, specificity 0.765, and total classification accuracy was 75.0%), while right occipital dipole density permitted a reliable classification of MCI patients and controls (sensitivity was 0.706, specificity 0.882, and total classification accuracy was 79.4%). Once LPD was confirmed as a reliable variable for the classification of AD and MCI patients a follow-up study was performed. The 17 MCI patients were followed for two years, with a clinical evaluation every 6 months; no loss to follow-up occurred. The cohort was divided into two groups based on a median split of the LPD measure: MCI-High, and MCI-Low. The two groups of MCI patients did not differ in terms of age or MMS score at baseline. After two years 5/17 patients (29.41%) met criteria for Probable AD. MMSE scores were significantly (pϭ0.042) reduced (8.8 Ϯ 7.01 points) in the converter group from baseline. Four of the 8 (50%) MCI-High patients developed AD, while only 1 out of 9 (11%) MCI-Low patients converted to dementia (RR ϭ 4.5, 95% CI ϭ .86-28.3). The estimated relative risk of conversion to AD was increased by 350% in those MCI patients with high LPD scores (MCI-High group). Conclusions: Results confirmed the important role of parietal delta dipole density in the evaluation of AD and MCI. A MEG-based assessment of AD and MCI patients might be considered a useful clinical test in the near future.
Journal of Clinical Neurophysiology, 2004
Conventional visual analysis and dipole density analysis of magnetoencephalographic data for both... more Conventional visual analysis and dipole density analysis of magnetoencephalographic data for both spike and low-frequency magnetic activity were compared for presurgical evaluation in temporal lobe epilepsy (TLE) in a sample of 26 drug-resistant operated TLE patients. A series of logistic regression analyses were performed. Dipole density sensitivity was superior to visual localization analysis. Three separated logistic models were calculated for interictal spikes, low-frequency magnetic activity, and the combination of both measures. A combined interictal spike/low-frequency magnetic activity model predicted correctly the operated temporal lobe in all patients. Clear-cut criteria for the probability model are proposed that are valid for 92.3% of cases in the sample. The quantitative approach proposed by this study is an evidence-based model for presurgical evaluation of temporal lobe epilepsy, which improves previous magnetoencephalographic investigations and establishes working clinical criteria for patient evaluation in TLE.
Estadistica Espanola, 1988
Alzheimer Disease & Associated Disorders, 2010
Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma... more Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma 1 L M MORÁN, MD,
Radiologia, 2006
OBJECTIVES Our objective was to apply quality criteria proposed by the European Commission (EC) G... more OBJECTIVES Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines to the brain CT examinations for cerebrovascular accident (CVA) diagnosis at single-slice spiral CT scanners from five different hospitals in the Madrid area. MATERIAL AND METHODS A sample of 100 brain CT examinations was collected and independently reviewed by five radiologists, to determine the degree of fulfilment of image quality criteria. Dose measurements were performed to estimate the values of the CT dose indexes (CTDIw, CTDIair), the dose length product (DLP), and the effective dose (E). RESULTS Once the McNemar test was applied to the sample, the number of observers' readings was reduced to three. The quality criteria were, in general, fulfilled, since mean values of image quality score between 80% and 92% were deduced, with variation coefficients per centre in the range of 0.07-0.1. However, both visualization criteria 1.1.2 and 1.1.3 exhibited similar ranges of ...
Methods of Psychological …, 2001
The performance of students in speech intelligibility tests is influenced by individual character... more The performance of students in speech intelligibility tests is influenced by individual characteristics such as sex and age, personality factors such as neuroticism (N), extraversion, attention and sensitivity to noise, and environmental conditions such as the location of the scholars in the classroom (LI), the location of the classroom itself with regard to extraneous noise (LO) and background noise (BN). The first aim of this study was to analyse the role of these factors in predicting performance. From a mathematical point of view the problem was to establish a model to reflect accurately the relationship between the expected proportion of successes and a set of covariates. We used a logistic regression model mainly because of its high mathematical flexibility. A further aim was to study in depth methodological questions such as the choice and assessment of the model, including its extension to a random-effects model. One hundred and seventy students participated in the study. The results indicate that only four of the factors studied had any significant bearing upon their performance: N, LI, BN and LO, and that the effect of the classroom on performance was a random one. The covariate pattern corresponding to the best performance is given by the following levels : (N) high, (LI) front row, (LO) playground and (BN) normal. For this pattern the estimated proportion of successes is 0.66.
Methods of Psychological …, 2001
The performance of students in speech intelligibility tests is influenced by individual character... more The performance of students in speech intelligibility tests is influenced by individual characteristics such as sex and age, personality factors such as neuroticism (N), extraversion, attention and sensitivity to noise, and environmental conditions such as the location of the scholars in the classroom (LI), the location of the classroom itself with regard to extraneous noise (LO) and background noise (BN). The first aim of this study was to analyse the role of these factors in predicting performance. From a mathematical point of view the problem was to establish a model to reflect accurately the relationship between the expected proportion of successes and a set of covariates. We used a logistic regression model mainly because of its high mathematical flexibility. A further aim was to study in depth methodological questions such as the choice and assessment of the model, including its extension to a random-effects model. One hundred and seventy students participated in the study. The results indicate that only four of the factors studied had any significant bearing upon their performance: N, LI, BN and LO, and that the effect of the classroom on performance was a random one. The covariate pattern corresponding to the best performance is given by the following levels : (N) high, (LI) front row, (LO) playground and (BN) normal. For this pattern the estimated proportion of successes is 0.66.
Radiología
Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines t... more Our objective was to apply quality criteria proposed by the European Commission (EC) Guidelines to the brain CT examinations for cerebrovascular accident (CVA) diagnosis at single-slice spiral CT scanners from five different hospitals in the Madrid area. A sample of 100 brain CT examinations was collected and independently reviewed by five radiologists, to determine the degree of fulfilment of image quality criteria. Dose measurements were performed to estimate the values of the CT dose indexes (CTDIw, CTDIair), the dose length product (DLP), and the effective dose (E). Once the McNemar test was applied to the sample, the number of observers' readings was reduced to three. The quality criteria were, in general, fulfilled, since mean values of image quality score between 80% and 92% were deduced, with variation coefficients per centre in the range of 0.07-0.1. However, both visualization criteria 1.1.2 and 1.1.3 exhibited similar ranges of fulfilment (38% - 94%). The good complia...
Radiología, 2004
... Nieves Gómez-Leóna • Ricardo Rodríguez-Gonzálezb,c • Alfonso Calzado-Canterab • Ángel Arenas ... more ... Nieves Gómez-Leóna • Ricardo Rodríguez-Gonzálezb,c • Alfonso Calzado-Canterab • Ángel Arenas de Pablod • Alfredo Cuevas-Ibáñeze • Begoña García-Castañof • Luz María Morán-Blancog • Pilar Morán-Pencob • Agustín Turrero-Noguésh aServicio de Radiodiagnóstico. ...
Trabajos de Estadistica, 1989