DOI:
10.1055/s-00030576
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics
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References
Cuckle HS, van Lith JM.
Appropriate biochemical parameters in first-trimester screening for Down syndrome.
Prenat Diagn 1999;
19 (06) 505-512 . Doi: 10.1002/(SICI)1097-0223(199906)19:6<505:AID-PD572>3.0.CO;2-6
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