1. Dept. Gynaecology Obstetrics, Hospital of Oberlausitzer Bergland Zittau, Germany

2. Dept. Gynaecology Obstetrics, Preetz Clinic, Preetz, Germany

3. Clinic Gynaecology Obstetrics, Maennedorf Hospital, Maennedorf, Switzerland

4. Women’s Clinic, Ortenau Hospital, Offenburg, Germany

5. Pelvic Floor Centre, Aachen District Medical Centre, Wuerselen, Germany

6. Dept. Surgery, Hospital of Ottobeuren, Ottobeuren, Germany

7. Dept. Surgery, Hospital of Ottobeuren, Ottobeuren, Germany