1. Comparative Neuromuscular Diseases Laboratory Royal Veterinary College London, Colorado, United Kingdom
2. Equine Internal Medicine Department, James L. Voss Veterinary Teaching Hospital Colorado State University Fort Collins Colorado USA
3. Oakham Veterinary Hospital Oakham, Rutland United Kingdom
4. Equine Emergency and Critical Care Department, James L. Voss Veterinary Teaching Hospital Colorado State University Fort Collins USA