1. School of Veterinary Nursing and Technology, Faculty of Veterinary ScienceNippon Veterinary and Life Science University Tokyo Japan
2. Laboratory of Laboratory Animal Science and Medicine, Department of Disease Control, Graduate School of Veterinary MedicineHokkaido University Sapporo Japan
3. Department of Veterinary Pathology, Faculty of Veterinary ScienceNippon Veterinary and Life Science University Tokyo Japan
4. Laboratory of Veterinary Clinical Oncology, Faculty of AgricultureTokyo University of Agriculture and Technology Tokyo Japan
5. Laboratory of Veterinary Biochemistry, School of Veterinary MedicineKitasato University Aomori Japan
6. Department of Urology, Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama University Okayama Japan