| Affiliation: | 1. Division of Reproductive Medicine, Center of Maternal‐Fetal, Neonatal, and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan;2. Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan;3. Sora no Mori Clinic, Okinawa, Japan;4. Department of Obstetrics and Gynecology, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan;5. Department of Comprehensive Reproductive Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan;6. Department of Obstetrics and Gynecology, Tokyo Metropolitan Bokutoh Hospital, Tokyo, Japan;7. Department of Obstetrics and Gynecology, Nippon Medical School, Tokyo, Japan;8. Japan Medical Association Research Institute, Tokyo, Japan;9. Department of Obstetrics and Gynecology, School of Medicine, Keio University, Tokyo, Japan |
