1. a Department of Surgical and Radiological Sciences, University of California, Davis, California, USA
2. b Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, California, USA
3. c William R. Pritchard Veterinary Medical Teaching Hospital, University of California, Davis, California, USA
4. d Department of Dermatology, School of Medicine, University of California, Davis, California, USA
5. e Department of Biomedical Engineering, University of California, Davis, California, USA