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First trimester risk assessment for trisomy 21 in twin pregnancies combining nuchal translucency and first trimester biochemical markers |
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| Authors: | Pilar Prats Ignacio Rodríguez Carmina Comas Bienvenido Puerto |
| Institution: | 1. Fetal Medicine Service, Department of Obstetrics, Gynecology and Reproductive Medicine, Institut Universitari Dexeus, Barcelona, Spain;2. Department of Maternal Fetal Medicine, Institut Clinic de Ginecologia, Obstetrícia I Neonatologia, Hospital Clínic, Barcelona, Spain |
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