1. Department of Veterinary Medicine and Surgery, 379 E. Campus Drive, Columbia, MO 65211
2. Veterinary Medical Diagnostic Laboratory, University of Missouri-Columbia, Columbia, MO 65211
3. Department of Small Animal Surgery and Medicine, Auburn University, AL 36489
4. Department of Veterinary Clinical Sciences, Iowa State University, Ames, IA 50011-1250
5. Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, 2015 Linden Drive West, Madison, WI 53706
6. VCA West Los Angeles Animal Hospital, 1818 S. Sepulveda Boulevard, Los Angeles, CA 90025
7. School of Veterinary Medicine, University of Pennsylvania, 3900 Spruce Street, Philadelphia, PA 19104, USA