1. Division of Prenatal Medicine and Therapy, Department of Obstetrics and Perinatal Medicine, University Hospital Marburg, Philipps University Marburg, Marburg, Germany
2. Division of Prenatal Medicine and Therapy, Department of Obstetrics and Perinatal Medicine, University Hospital Giessen, Liebig University Giessen, Giessen, Germany
3. University Children Hospital Marburg, Philipps University Marburg, Marburg, Germany