1. Animal Medical Center; Gifu University; Yanagido Gifu-shi Gifu 501-1193 Japan
2. Department of Veterinary Clinical Oncology; Gifu University; Yanagido Gifu-shi Gifu 501-1193 Japan
3. Department of Pathology; Gifu University; Yanagido Gifu-shi Gifu 501-1193 Japan