P033: Adjustment of cut-off levels in first trimester screening test for trisomy 21
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2010 ◽
Vol 36
(5)
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pp. 542-547
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2004 ◽
Vol 104
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pp. 661-666
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2013 ◽
pp. 181-186
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2005 ◽
Vol 192
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pp. 1107-1111
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2020 ◽
Vol 59
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pp. 835-837
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2009 ◽
Vol 201
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pp. S38
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2009 ◽
Vol 33
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pp. 387-393
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