1. Spontaneous Neuromuscular Disease Program, Scott‐Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL
2. Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, MI
3. Veterinary Referral Associates, Gaithers‐burg, MD
4. Department of Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, WA