1. Research Institute of Biosciences, Azabu University, School of Veterinary Medicine, 1–17–71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252–5201, Japan
2. Laboratory of Internal Medicine 3 Azabu University, School of Veterinary Medicine, 1–17–71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252–5201, Japan
3. Veterinary Teaching Hospital, Azabu University, School of Veterinary Medicine, 1–17–71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252–5201, Japan