1. International Center for Reproductive Medicine, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan.
2. Japan Society for Fertility Preservation, Yokohama, Kanagawa, Japan.
3. Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan.
4. Department of Obstetrics and Gynecology, Mie University, Tsu, Mie, Japan.
5. Department of Obstetrics and Gynecology, The Kyorin University, Mitaka, Tokyo, Japan.
6. Faculty of Humanities and Social Sciences, Shizuoka University, Shizuoka, Shizuoka, Japan.
7. Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Kanagawa, Japan.