1. Department of Obstetrics and Gynecology, Freiburg University Medical Center, Freiburg, Germany; Departments of Obstetrics and Gynecology, and Pathology, University Medical Center, Vienna, Austria;
2. Department of Obstetrics and Gynecology, Freiburg University Medical Center, Freiburg, Germany; Departments of Obstetrics and Gynecology, and Pathology, University Medical Center, Vienna, Austria