1. Department of Clinical Sciences North Carolina State University College of Veterinary Medicine Raleigh North Carolina USA
2. Department of Veterinary Medicine and Surgery College of Veterinary Medicine, University of Missouri Columbia Missouri USA
3. Department of Veterinary Clinical Sciences College of Veterinary Medicine, The Ohio State University Columbus Ohio USA
4. Department of Clinical Sciences Cummings School of Veterinary Medicine at Tufts University North Grafton Massachusetts USA
5. Department of Clinical Sciences College of Veterinary Medicine, Cornell University Ithaca New York USA