1. Department of Small Animal Clinical Science, College of Veterinary Medicine, University of Florida, Gainesville, FL
2. Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA
3. Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN
4. Department of Emergency and Critical Care, Veterinary Specialty Center, Bannockburn, IL