1. 1From the Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
2. 2From the Department of Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210
3. 3From the Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
4. 4From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996
5. 5From the Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706
6. 6From the VCA Alta Vista Animal Hospital, Ottawa, ON K1T 1M9, Canada
7. 7From the Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, GA 30602
8. 8From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506
9. 9From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32608
10. 10From the Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607
11. 11From the VCA West Los Angeles Animal Hospital, Los Angeles, CA 90025
12. 12From the Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
13. 13From the Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
14. 14From the Department of Clinical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN 55108
15. 15From the Veterinary Referral Surgical Practice, Roswell, GA 30076
16. 16From the Department of Veterinary Clinical and Diagnostic Services, Faculty of Veterinary Medicine, University of Calgary, AB T3C 0J8, Canada
17. 17From the VCA Canada Western Veterinary Specialist and Emergency Centre, Calgary, AB T3C 0J8, Canada
18. 18From the Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104
19. 19From the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824.