Maternal serum screening for Down's syndrome in the first trimester of pregnancy (original) (raw)

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Examination of the pregnancy-associated plasma protein-A assay on the Beckman Coulter Access(R) platform: suitability for use in first trimester Down's syndrome screening

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eta-analysis of first trimester Down syndrome screening tudies: free -human chorionic gonadotropin significantly utperforms intact human chorionic gonadotropin in a ultimarker protocol

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2007

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