1. Laboratory of Veterinary Anatomy, Department of Basic Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
2. United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
3. Preclinical Department, Faculty of Veterinary Science, Kabul University, Kabul, Afghanistan
4. Obihiro Zoo, Obihiro 080-0846, Japan
5. Nippon Beet Sugar Manufacturing Co., Ltd., Obihiro 080-0831, Japan
6. Laboratory of Veterinary Pathology, Department of Basic Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan