[1] Fujian Med Univ, Sch Basic Med Sci, Dept Immunol, Fuzhou, Peoples R China
[2] Chinese Acad Agr Sci, State Key Lab Vet Biotechnol, Harbin Vet Res Inst, Harbin, Peoples R China
[3] Univ Calgary, Dept Microbiol Immunol & Infect Dis, Calgary, AB, Canada