1. School of Veterinary Nursing & Technology, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonancho, Musashino, Tokyo 180-8602, Japan
2. Kenhoku Veterinary Clinical Center, Miyagi Prefectural Agricultural Mutual Aid Association, 1-3-1 Nakae, Sanuma, Hasamacho, Tome, Miyagi 987-0511, Japan
3. Kennan Veterinary Clinical Center, Miyagi Prefectural Agricultural Mutual Aid Association, 10 Sakuraokamae, Hukuokahukaya, Shiroishi, Miyagi 989-0731, Japan