1. Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
2. Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, Nishi-shinjuku 1-19-6, Shinjuku-ku, Tokyo, Japan
3. Department of Obstetrics and Gynecology, Oita University, Faculty of Medicine, Idaigaoka 1-1, Hasama-machi, Yufu-shi, Oita, Japan
4. Medical Technology Innovation Center, Juntendo University, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
5. Clinical Research and Trial Center, Juntendo University Hospital, Hongo 2-1-1, Bunkyoku, Tokyo, Japan