1. Department of Gynecology, Obstetrics and Reproductive Medicine, Saarland University Hospital, D-66421 Homburg, Germany
2. Department of Gynecology and Obstetrics, Klinikum Bremen Nord, D-28755 Bremen, Germany
3. Institute and Policlinic of Diagnostic and Interventional Radiology, Medical University, TU Dresden, D-01307 Dresden, Germany
4. Department of Gynecology, Tübingen University Hospital, D-72076 Tübingen, Germany
5. Department of Gynecology, University Medical Center Freiburg, D-79106 Freiburg, Germany
6. Department of Gynecology, Martin Luther Hospital, Johannesstift Diakonie, D-14193 Berlin, Germany
7. Frauenklinik an der Elbe, D-20457 Hamburg, Germany
8. Department of Gynecology, D-66346 Püttlingen, Germany
9. Department of Gynecology and Obstetrics, University Medical Center Mannheim, Heidelberg University, D-68167 Mannheim, Germany