1. Department of Clinical Sciences Colorado State University College of Veterinary Medicine and Biomedical Sciences Fort Collins Colorado USA
2. Department of Clinical Sciences North Carolina State University College of Veterinary Medicine Raleigh North Carolina USA
3. Department of Veterinary Clinical Sciences Iowa State University College of Veterinary Medicine Ames Iowa USA
4. Department of Veterinary Clinical Sciences The Ohio State University College of Veterinary Medicine Columbus Ohio USA
5. Department of Clinical Sciences Kansas State University College of Veterinary Medicine Manhattan Kansas USA