1. Department of Small Animal Clinical Services, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX
2. Metropolitan Veterinary Associates, Norristown, PA
3. Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA
4. Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA
5. Department of Population Health Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA