1. Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
2. Present: Reproductive Medical Center, Yokohama City University Medical Center, Kanagawa 232-0024, Japan
3. Research and Development Center, Fuso Pharmaceutical Industries, Ltd., Osaka 536-8523, Japan
4. Present: Faculty of Biology-Oriented Science and Technology (BOST), KINDAI University, Wakayama 649-6493, Japan
5. Asada Institute for Reproductive Medicine, Asada Ladies Clinic, Aichi 486-0931, Japan