1Department of Obstetrics and Gynecology, Gifu University Hospital, 1-1 Yanagido, Gifu City, Gifu 501-1194 Japan
2Department of Clinical Research Strategy, Center for Collaborative Research and Education, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
3Innovative and Clinical Research Promotion Center, Gifu University Hospital, Gifu, Japan
4Reproductive Medicine Center, Osaka General Medical Center, Osaka, Japan
5Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan
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