1. Department of Pathobiology, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA (Engiles)
2. Gail Holmes Orthopaedic Research Center, Department of Clinical Studies, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO (Stewart)
3. Department of Veterinary Science, Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY (Janes, Kennedy)