Institution: | 1. University of Tennessee, Knoxville Tennessee, USA ; 2. Iowa State University, Ames Iowa, USA ; 3. University of Wisconsin, Madison Wisconsin, USA ; 4. Wisconsin Veterinary Diagnostic Laboratory, Madison Wisconsin, USA ; 5. Texas A&M University, College Station Texas, USA ; 6. College of Veterinary Medicine, Veterinary Diagnostic/Production Animal Medicine, Iowa State University, Ames Iowa, USA ; 7. Western College of Veterinary Medicine, Saskatoon Saskatchewan, Canada |