1. Department of Gynecology & Obstetrics Division of Prenatal Medicine Campus Luebeck University Hospital of Schleswig‐Holstein Luebeck Schleswig‐Holstein Germany
2. Elbe Center of Prenatal Medicine and Human Genetics Hamburg Germany
3. Department of Obstetrics Charité‐Universitätsmedizin Berlin ‐ CCM Berlin Germany
4. Prenatal Medicine Bergmannstrasse, Berlin Germany