1. Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine and Faculty of Medicine, Sapporo, Japan.
2. University of Pennsylvania, School of Veterinary Medicine, Biomedical Science, Philadelphia, PA, USA.
3. Department of Gynecologic Oncology, NHO Shikoku Cancer Center, Matsuyama, Japan.
4. Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
5. Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan.
6. Department of Obstetrics and Gynecology, International University of Health and Welfare, Narita, Japan.
7. Department of Medical Oncology, National Cancer Center Hospital East, Kashiwa, Japan.
8. Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan.
9. Department of Obstetrics and Gynecology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Miyagi, Japan.
10. Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
11. Department of Obstetrics and Gynecology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
12. Department of Obstetrics and Gynecology, Tokai University School of Medicine, Isehara, Japan.
13. Akasaka Sanno Medical Center, Tokyo, Japan14International University of Health and Welfare, Graduate School, Tokyo, Japan.