1. Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station Texas
2. Department of Small Animal Clinical Sciences, College of Veterinary Medicine; Michigan State University; East Lansing Michigan
3. Friendship Surgical Specialists of the Friendship Hospital for Animals; Washington DC
4. Palm Beach Veterinary Specialists; West Palm Beach Florida
5. Center for Veterinary Pain Management and Rehabilitation; The Woodlands Texas
6. Oregon Veterinary Referral Associates; Springfield Oregon
7. Anesthesia and Pain Management Services; Massachusetts Veterinary Referral Hospital; Woburn Massachusetts
8. Faculty of Veterinary Medicine; Université de Montréal; St-Hyacinthe Quebec Canada
9. Department of Clinical Sciences, Faculty of Veterinary Medicine; Université de Montréal; St-Hyacinthe Quebec Canada