1. Veterinary Clinical Sciences, Oklahoma State University, 1 Farm Rd, Stillwater, OK 74078, USA
2. Innovative Livestock Solutions, Blackie, AB, Canada
3. Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, USA
4. College of Veterinary Medicine, Western College of Health Sciences, Pomona, CA, USA
5. Veterinary Pathobiology, Oklahoma State University, 1 Farm Rd, Stillwater, OK 74078, USA