1. Biological Laboratory, Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kyushu Sangyo University, Higashi-ku, Fukuoka 813–8530, Japan
2. Division of Animal Resource Science, School of Agriculture, Graduate School, Kyushu University, Higashi-ku, Fukuoka 812–8581, Japan
3. Heisui Junior High School, Kurume, 839–0828, Japan
4. Muromi Animal Hospital, Muromi, Sawara-ku, Fukuoka 814–0015, Japan