1. Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University College of Veterinary Medicine, Ames, Iowa.
2. Department of Veterinary Microbiology and Preventive Medicine, Iowa State University College of Veterinary Medicine, Ames, Iowa.
3. Department of Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada.
4. National Institute of Antimicrobial Resistance Research and Education, Iowa State University of Science and Technology, Ames, Iowa.
5. Department of Veterinary Pharmacology, Royal Veterinary College, London, United Kingdom.
6. Department of Biomedical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa.