1. Department of Obstetrics and Gynecology, Graduate School of Medicine, Mie University, 2-174 Edo-bashi, Tsu 514-8507, Japan
2. Center of Advanced Reproductive Medicine, Mie University Hospital, 2-174 Edobashi, Tsu 514-8507, Japan
3. Obstetrics and Gynecology, Mie University Hospital, 2-174 Edobashi, Tsu 514-8507, Japan
4. BMG, Inc., 45 Minamimatsunoki-cho, Higashikujo, Minami-ku, Kyoto 601-8023, Japan