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Prenatal characteristics of false negative cases from first-trimester screening of Down syndrome (trisomy 21) |
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| Authors: | Tanja Schlaikjær Simonsen Steen Sørensen Charlotte Ekelund Finn Stener Jørgensen the Danish Fetal Medicine Research Group |
| Affiliation: | 1. Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hvidovre Hospital, University of Copenhagen, Denmark Department of Clinical Biochemistry, Hvidovre Hospital, University of Copenhagen, Denmark;2. Department of Clinical Biochemistry, Hvidovre Hospital, University of Copenhagen, Denmark;3. Fetal Medicine Unit, Department of Obstetrics and Gynecology, Rigshospitalet, University of Copenhagen, Denmark |
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