1. Veterinary Teaching Hospital; Graduate School of Veterinary Medicine; Hokkaido University; Sapporo Japan
2. Laboratory of Veterinary Internal Medicine; Department of Veterinary Clinical Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Sapporo Japan
3. Laboratory of Comparative Pathology; Department of Veterinary Clinical Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Sapporo Japan