1. Atsuki Veterinary Medical Center, 4–17–3 Nojihigashi, Kusatsu, Shiga 525–0058, Japan
2. Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582–1 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
3. Senri Momoyamadai Animal Hospital, 3–20–8 Kasuga, Suita, Osaka 565–0853, Japan
4. Department of Veterinary Surgery, School of Life and Environmental Sciences, Osaka Prefecture University, 1–58 Rinku-ouraikita, Izumisano, Osaka 598–8531, Japan