| Institution: | 1. Center of Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan;2. Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan;3. Department of Obstetrics and Gynecology, Hyogo College of Medicine, Nishinomiya, Japan;4. Department of Obstetrics, Osaka City General Hospital, Osaka, Japan;5. Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan;6. Department of Obstetrics and Gynecology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan;7. Department of Obstetrics and Gynecology, Aiiku Clinic, Tokyo, Japan;8. Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan;9. Department of Obstetrics and Gynecology, Tokyo Women's Medical University, Tokyo, Japan;10. Department of Obstetrics and Gynecology, Toho University Omori Medical Center, Tokyo, Japan;11. Department of Maternal and Fetal Medicine, Miyagi Children's Hospital, Sendai, Japan;12. Department of Obstetrics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan;13. Department of Obstetrics and Gynecology, Saitama Medical University, Moroyama, Japan;14. Department of Obstetrics and Gynecology, Yokohama City University Graduate School of Medicine, Yokohama, Japan;15. Department of Obstetrics and Gynecology, Clinical Research Institute, National Kyusyu Medical Center, Fukuoka, Japan;16. Department of Obstetrics and Gynecology, Nagasaki University School of Medicine, Nagasaki, Japan;17. Department of Obstetrics and Gynecology, Tokai University School of Medicine, Isehara, Japan |
