1. Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, Minnesota, USA
2. Mid-Central Research and Outreach Center, University of Minnesota, Willmar, Minnesota, USA
3. Department of Veterinary Population Medicine, University of Minnesota, Saint Paul, Minnesota, USA
4. Minneapolis Veterans Health Care System, Minneapolis, Minnesota, USA
5. Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
6. Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, Iowa, USA
7. Department of Population Health, University of Georgia, Athens, Georgia, USA