1. Department of Gynecology Miyake Ofuku Clinic Okayama City Okayama Prefecture Japan
2. Medical Data Labo Okayama City Okayama Prefecture Japan
3. Department of Gynecologic Oncology Saitama Medical University International Medical Center Hidaka City Saitama Prefecture Japan
4. Department of Obstetrics and Gynecology Miyake Clinic Okayama City Okayama Prefecture Japan
5. Department of Perinatology and Gynecology Kagawa University Graduate School of Medicine Miki Town Kagawa Prefecture Japan