1. Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences Texas A&M University College Station Texas USA
2. Department of Small Animal Clinical Sciences University of Tennessee Knoxville Tennessee USA
3. Department of Clinical Sciences and Advanced Medicine, Section of Radiology University of Pennsylvania, School of Veterinary Medicine Philadelphia Pennsylvania USA
4. Department of Molecular and Biomedical Sciences North Carolina State University Raleigh North Carolina USA
5. Department of Veterinary Clinical Sciences, College of Veterinary Medicine Washington State University Pullman Washington USA