Maternal serum levels of total activin-A in first-trimester trisomy 21 pregnancies
1993 ◽
Vol 100
(4)
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pp. 324-326
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2013 ◽
Vol 208
(1)
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pp. S271
2007 ◽
Vol 31
(1)
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pp. 10-14
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2001 ◽
Vol 98
(4)
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pp. 608-611
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2000 ◽
Vol 20
(8)
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pp. 635-639
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