Affiliation: | aDepartment of Obstetrics and Gynecology, Saiseikai Shimonoseki General Hospital, Shimonoseki, Yamaguchi, Japan;bDepartment of Reproductive Medicine and Surgery, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, Kumamoto City, Kumamoto, Japan;cSekiel Ladies Clinic, Takasaki, Gumma, Japan |