1. School of Veterinary Medicine, Azabu University, Fuchinobe 1-17-71, Chuo-ku, Sagamihara, Kanagawa 252-0206, Japan
2. Animal Medical Center, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu, Tokyo 183–8509, Japan
3. Anicom Specialty Medical Institute Inc., Nishi-shinjuku 8-17-1, Shinjuku, Tokyo 160-0023, Japan
4. Faculty of Veterinary Medicine, Okayama University of Science, Ikoinooka 1–3, Imabari, Ehime 794–8555, Japan