1. Laboratory of Internal Medicine III
2. Northern Clinical Centre; Chiba Prefectural Foundation of Agricultural and Mutual Aid Association; 99-1 Makino Katori Chiba 289-0407 Japan
3. Laboratory of Pathology; Azabu University School of Veterinary Medicine; 1-17-71 Fuchinobe Sagamihara Kanagawa 229-8501 Japan