1. School of Veterinary Nursing and Technology, Faculty of Veterinary Science, Musashino, Tokyo 180‑8602, Japan
2. Laboratory of Veterinary Pathology, School of Veterinary Science, Musashino, Tokyo 180‑8602, Japan
3. Laboratory of Anatomy II, Department of Veterinary Medicine, School of Veterinary Medicine, Azabu University, Sagamihara, Kanagawa 252‑5201, Japan
4. Laboratory of Animal Science and Medicine, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060‑0818, Japan
5. Laboratory of Veterinary Hygiene, School of Veterinary Science, Nippon Veterinary and Life Science University, Musashino, Tokyo 180‑8602, Japan
6. Laboratory of Clinical Oncology, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183‑8538, Japan
7. Department of Applied Life Science, FacDepartment of Applied Life Science, Faculty of Food Science, Nippon Veterinary and Life Science University, Musashino, Tokyo 180‑8602, Japanulty of Food Science, Nippon Veterinary and Life Science University, Musashino, Tokyo 180‑8602
8. Department of Urology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700‑8558, Japan
9. Research Center for Animal Life Science, Nippon Veterinary and Life Science University, Musashino, Tokyo 180‑8602, Japan