1. Department of General Gynaecology and Gynaecological Oncology; Medical University of Vienna; Vienna Austria
2. Department of Anaesthesiology; Medical University of Vienna; Vienna Austria
3. Outcomes Research Consortium; Cleveland OH USA
4. Department of Urology; Medical University of Vienna; Vienna Austria
5. Department of Special Gynaecology and Obstetrics; Karl Landsteiner Institute; Vienna Austria