1. Veterinary Medical Center, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
2. Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
3. Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
4. Laboratory of Veterinary Surgery, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
5. Laboratory of Veterinary Internal Medicine, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan