1. Animal Health Laboratory; Faculty of Veterinary Medicine; Rakuno Gakuen University; Ebetsu Hokkaido 069-8501 Japan
2. Veterinary Biochemistry; Faculty of Veterinary Medicine; Rakuno Gakuen University; Ebetsu Hokkaido 069-8501 Japan
3. Department of Animal Health; School of Veterinary Medicine; Azabu University; Sagamihara Kanagawa 229-8501 Japan