1. Department of Veterinary Internal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University
2. Veterinary Teaching Hospital, Rakuno Gakuen University
3. Hokkaido Animal Research Center
4. Department of Nemuro Agricultural Mutual Relief Association
5. Science University of Tokyo, Research Institute for Biological Sciences
6. Department of Veterinary Pathology, Rakuno Gakuen University