[1] University Hospital rechts der Isar,Department of Obstetrics and Gynecology
[2] Technical University of Munich,Institute for Medical Informatics, Statistics and Epidemiology (IMedIS)
[3] University Hospital rechts der Isar,Department of Obstetrics and Gynecology, Division of Prenatal Medicine, University Hospital UKGM
[4] Technical University of Munich,undefined
[5] Justus-Liebig University,undefined