Prospective study evaluating performance of first-trimester combined screening for trisomy 21 using repeat sampling of maternal serum markers PAPP-A and free β-hCG
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| Description | scientific article published on 01 September 2012 |
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author: Bodil Hammer Bech Lennart Friis-Hansen Steen Sørensen Olav B. Petersen Niels Tørring Ann Tabor Charlotte Ekelund |
| Publication date | September 1, 2012 |
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