1. Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan
2. Division of Biostatistics, Department of Clinical Medicine, Kitasato University School of Pharmacy, Tokyo, Japan
3. Department of Gynecology, Aichi Cancer Center Hospital, Aichi, Japan
4. Department of Obstetrics and Gynecology, Kindai University Faculty of Medicine, Osaka, Japan
5. Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Kanagawa, Japan
6. Department of Gynecology, Niigata Cancer Center Hospital, Niigata, Japan
7. Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan
8. Department of Obstetrics and Gynecology, School of Medicine, Iwate Medical University, Iwate, Japan
9. Department of Obstetrics and Gynecology, Jikei University School of Medicine, Tokyo, Japan
10. Department of Gynecology, Tohoku University Hospital, Miyagi, Japan
11. Department of Gynecology, Cancer Institute Hospital, Japanese Foundation for Cancer Research Tokyo, Japan
12. Division of Obstetrics and Gynecology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
13. Clinical Research, Innovation and Education Center, Tohoku University Hospital, Miyagi, Japan
14. Gynecology Service, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
15. Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Miyagi, Japan