1. Department of Surgery, Surgical Oncology and Science Sapporo Medical University School of Medicine Sapporo Japan
2. Division of Urology, Faculty of Medicine, Department of Surgery Tottori University Yonago Japan
3. Faculty of Medicine, Department of Obstetrics and Gynecology Kagoshima University Kagoshima Japan
4. Department of Gynecology and Obstetrics Kyoto University Graduate School of Medicine Kyoto Japan
5. Department of Gastrointestinal Surgery Tokyo Medical and Dental University Tokyo Japan
6. Department of Urology Ehime University Graduate School of Medicine Matsuyama Japan
7. Department of Urology St. Luke's International Hospital Tokyo Japan
8. Department of Obstetrics and Gynecology Medical Research Institute Kitano Hospital Osaka Japan
9. Second Department of Anatomy Sapporo Medical University Sapporo Japan
10. Department of Surgery Japanese Red Cross Osaka Hospital Osaka Japan
11. Department of Surgery Kitasato University Kitasato Institute Hospital Tokyo Japan