1. Division of Life Science, Graduate School of Agriculture, Meiji University, Kanagawa 214-8571, Japan
2. Research Fellow of the Japan Society for the Promotion of Science
3. Institute of Reproduction and Endocrinology, Meiji University, Kanagawa 214-8571, Japan
4. Laboratory of Anatomy and Cell Biology, Department of Health Sciences, Kyorin University, Tokyo 192-8508, Japan
5. Department of Life Science, School of Agriculture, Meiji University, Kanagawa 214-8571, Japan