Age independent first trimester screening for Down syndrome: improvement in test performance
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2010 ◽
Vol 283
(4)
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pp. 749-754
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2004 ◽
Vol 191
(6)
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pp. S176
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2004 ◽
Vol 44
(3)
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pp. 205-209
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2016 ◽
Vol 71
(5)
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pp. 277-279
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