1. Department of Clinical Sciences; College of Veterinary Medicine, Oregon State University; Corvallis Oregon
2. Wisconsin Veterinary Referral Center; Waukesha Wisconsin
3. Ocean State Veterinary Specialists; East Greenwich Rhode Island
4. Veterinary Specialty Hospital of the Carolinas; Cary North Carolina
5. Department of Clinical Sciences; College of Veterinary Medicine, North Carolina State University; Raleigh North Carolina