1 Department of Gynecology and Obstetrics, University Hospital Tübingen, Calwerstrasse 7, 72076, Tübingen, Germany. christl.reisenauer@med.uni-tuebingen.de.
2 Department of Urology, University Hospital Tübingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany.