1. Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Nippon Veterinary and Life Science University, 7–1 Kyonan-cho 1-chome, Musashino, Tokyo 180–8602, Japan
2. School of Veterinary Nursing and Technology, Nippon Veterinary and Life Science University, 7–1 Kyonan-cho 1-chome, Musashino, Tokyo 180–8602, Japan