Maternal serum a-fetoprotein levels in pregnancies among black and white women with fetal open spina bifida: A United States Collaborative Study
1990 ◽
Vol 162
(2)
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pp. 328-331
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Keyword(s):
2008 ◽
Vol 7
(1)
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Keyword(s):
2011 ◽
Vol 5
(3)
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pp. 223-229
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Keyword(s):
2013 ◽
Vol 209
(3)
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pp. 223.e1-223.e5
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Keyword(s):
1998 ◽
Vol 244
(5)
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pp. 417-424
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