Second-trimester biparietal diameter/nasal bone length ratio is not a strong postive predictor of trisomy 21
2003 ◽
Vol 189
(6)
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pp. S237
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2005 ◽
Vol 24
(6)
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pp. 805-810
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2011 ◽
Vol 39
(2)
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pp. 185-190
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2007 ◽
Vol 30
(3)
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pp. 271-274
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2005 ◽
Vol 193
(6)
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pp. S149
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2005 ◽
Vol 24
(11)
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pp. 1487-1489
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