1. Department of Biochemistry, Asahikawa Medical University, Hokkaido 078-8510, Japan
2. Faculty of Marine Science and Technology, Fukui Prefectural University, Fukui 917-0003, Japan
3. Division of Molecular Genetics, Institute of Life Sciences, Kurume University, Fukuoka 830-0011, Japan
4. Center for Animal Disease Control, Frontier Science Research Center, University of Miyazaki, Miyazaki 889-1692, Japan
5. National Center for Child Health and Development Research Institute, Tokyo 157-8535, Japan
6. Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan