Sven Mahner1, Linn Wölber2. 1. Department of Gynaecology and Gynaecologic Oncology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany. Electronic address: s.mahner@uke.uni-hamburg.de. 2. Department of Gynaecology and Gynaecologic Oncology, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany.