Analysis of maternal serum alpha-fetoprotein and free beta human chorionic gonadotrophin in the first trimester: Implications for down's syndrome screening
1998 ◽
Vol 18
(6)
◽
pp. 585-589
◽
1989 ◽
Vol 96
(4)
◽
pp. 499-500
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Keyword(s):
Keyword(s):
1990 ◽
Vol 97
(3)
◽
pp. 272-274
◽
1997 ◽
Vol 17
(11)
◽
pp. 1085-1085
◽
1989 ◽
Vol 96
(1)
◽
pp. 52-60
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Keyword(s):
1996 ◽
Vol 5
(1)
◽
pp. 1-6