[1] Univ Calif Davis, Sch Vet Med, Dept Surg & Radiol Sci, One Shield Ave, Davis, CA 95616 USA
[2] Univ Calif Davis, Sch Vet Med, Dept Pathol Microbiol & Immunol, Davis, CA 95616 USA
[3] Univ Calif Davis, Sch Vet Med, William R Pritchard Vet Med Teaching Hosp, Davis, CA 95616 USA
[4] Univ Calif Davis, Sch Vet Med, Dept Dermatol, Davis, CA 95616 USA
[5] Univ Calif Davis, Sch Vet Med, Dept Biomed Engn, Davis, CA 95616 USA