OC15.02: Retronasal triangle view for nasal bone assessment in the first-trimester screening for aneuploidy: a prospective study of 1977 fetuses
2014 ◽
Vol 43
(3)
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pp. 272-276
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2019 ◽
Vol 220
(1)
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pp. S563-S564
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2005 ◽
Vol 192
(4)
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pp. 1107-1111
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2007 ◽
Vol 196
(1)
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pp. e19
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2007 ◽
Vol 2007
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pp. 6-8
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