Positive predictive values for detection of trisomies 21, 18 and 13 and termination of pregnancy rates after referral for advanced maternal age,first trimester combined test or ultrasound abnormalities in a national screening programme (2007–2009) 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Positive predictive values for detection of trisomies 21, 18 and 13 and termination of pregnancy rates after referral for advanced maternal age,first trimester combined test or ultrasound abnormalities in a national screening programme (2007–2009)

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