1. Department of Gynecology and Obstetrics Saarland University Hospital Homburg Germany
2. Department of Gynecology and Obstetrics Klinikum Bremen‐Nord Bremen Germany
3. Institute and Policlinic of Diagnostic and Interventional Radiology, Medical University TU Dresden Dresden Germany
4. Department of Obstetrics and Gynecology "Carol Davila" University of Medicine and Pharmacy Bucharest Romania
5. Institute of Medical Biometry, Epidemiology & Medical Informatics, Saarland University Hospital Homburg Germany