1. Divison of Laboratory Animal Science, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
2. Department of Basic Science, School of Veterinary Nursing and Technology, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1, Kyonancho, Musashino, Tokyo 180-8602, Japan
3. Laboratory of Comparative and Behavioral Medicine, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1, Kyonancho, Musashino, Tokyo 180-8602, Japan
4. Laboratory of Wildlife Medicine, School of Veterinary Medicine, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1, Kyonancho, Musashino, Tokyo 180-8602, Japan