Screening for fetal trisomy 21 in gestational weeks 6 and 7
Publisher: John Wiley & Sons Inc
E-ISSN: 1600-0412|89|9|1218-1221
ISSN: 0001-6349
Source: ACTA OBSTETRICIA ET GYNECOLOGICA SCANDINAVICA, Vol.89, Iss.9, 2010-09, pp. : 1218-1221
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Abstract