[1] Yamaguchi Univ, United Grad Sch Vet Med, Lab Mol Diagnost & Therapeut, 1677-1 Yoshida, Yamaguchi 7538515, Japan
[2] Yamaguchi Univ, Joint Fac Vet Med, Lab Vet Pathol, Yamaguchi 7538515, Japan
[3] Gifu Univ, Lab Vet Pathol, Pathogenet Vet Med, Joint Dept Vet Med,Fac Appl Biol Sci, Gifu 5011193, Japan
[4] Yamaguchi Univ, Joint Fac Vet Med, Lab Vet Internal Med, Yamaguchi 7538515, Japan