Affiliation: | 1. Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Japan;2. Department of Frontier Medicine, Institute of Medical Science, St. Marianna University School of Medicine, Kawasaki, Japan;3. Department of Obstetrics and Gynecology, Advanced Reproduction Research Center, International University of Health and Welfare School of Medicine, Narita, Japan;4. Tsukuba Kiba Park Clinic, Reproductive Medicine, Tsukuba, Japan |