P067: Examination of fetal nasal bone in the mid-second trimester in the Chinese population?preliminary results
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2008 ◽
Vol 34
(4)
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pp. 518-523
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2005 ◽
Vol 24
(11)
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pp. 1487-1489
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2006 ◽
Vol 32
(4)
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pp. 403-407
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2017 ◽
Vol 97
(2)
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pp. 180-186
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