1. Department of Veterinary Clinical Sciences, College of Veterinary Medicine; Purdue University; West Lafayette IN USA
2. Department of Comparative Pathobiology, College of Veterinary Medicine; Purdue University; West Lafayette IN USA
3. Department of Small Animal Clinical Sciences, College of Veterinary Medicine & Biomedical Sciences; Texas A&M University; College Station TX USA
4. Gulf Coast Veterinary Neurology and Neurosurgery; Houston TX USA
5. VCA West Los Angeles Animal Hospital; Los Angeles CA USA
6. Department of Clinical Sciences, College of Veterinary Medicine; Cornell University; Ithaca NY USA
7. Department of Small Animal Clinical Sciences; Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech; Blacksburg VA USA