1. Department of Obstetrics and Gynecology, Tokyo Women’s Medical University
2. Department of Transfusion and Cell Therapy, Tokyo Women’s Medical University Medical Center East
3. Department of Gynecology, Kitasato University Kitasato Institute Hospital
4. Department of Obstetrics and Gynecology, Tokyo Women’s Medical University Medical Center East
5. Department of Gynecology, Funabashi Futawa Hospital