1. Small Animal Clinics, Department of Veterinary Medicine, Graduate School of Veterinary Medicine, Azabu University, Kanagawa, Japan
2. Laboratory of Veterinary Surgery, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
3. Laboratory of Veterinary Radiology, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
4. Veterinary Medical Center, Osaka Metropolitan University, Osaka, Japan
5. Kiki Animal Clinic, Osaka, Japan