1. Center for Comparative Medicine, University of California, Davis School of Medicine, Davis, California, USA
2. Department of Biomedical Engineering, University of California, Davis School of Medicine, Davis, California, USA
3. Department of Microbiology and Molecular Genetics, University of California, Davis School of Medicine, Davis, California, USA
4. Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, People’s Republic of China
5. Department of Veterans Affairs, Tennessee Valley Healthcare Systems, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
6. Department of Medicine, University of California, Davis School of Medicine, Davis, California, USA
7. Department of Microbiology & Immunology, University of California, Davis School of Medicine, Davis, California, USA