1. Department of General Gynaecology and Gynaecologic Oncology Medical University of Vienna Vienna Austria
2. Department of Anaesthesiology Medical University of Vienna Vienna Austria
3. Centre for Medical Statistics, Informatics and Intelligent Systems (Institute of Medical Statistics) Medical University of Vienna Vienna Austria
4. Department of Gynaecology and Obstetrics University Hospital Tulln Karl Landsteiner University of Health Sciences Tulln Austria
5. Department of Special Gynaecology and Obstetrics Karl Landsteiner Institute Währinger Gürtel Austria