1. 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
2. Laboratory of Biomolecular Chemistry; School of Veterinary Medicine; Faculty of Veterinary Science; Nippon Veterinary and Life Science University; 1-7-1 Kyonancho Musashino Tokyo 180-8602 Japan
3. Veterinary Medical Teaching Hospital; Faculty of Veterinary Science; Nippon Veterinary and Life Science University; 1-7-1 Kyonancho Musashino Tokyo 180-8602 Japan
4. Department of Veterinary Surgery; Faculty of Agriculture; Yamaguchi University; 1677-1 Yoshida Yamaguchi 753-8515 Japan