1. Department of Veterinary Biosciences, The Ohio State University College of Veterinary Medicine, Columbus, OH (Jenkins)
2. Diagnostic Center for Population and Animal Health, Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, Lansing, MI (Agnew)
3. Athens Veterinary Diagnostic Laboratory, Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA (Rissi)