1. Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
2. Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
3. Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
4. Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
5. Japan Small Animal Cancer Center Saitama Japan
6. Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
7. Veterinary Medical Center, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan