1. Equine Clinic; Section Internal Medicine; University of Veterinary Medicine Vienna; Veterinärplatz, 1 1210 Wien Austria
2. Institute of Pathology; University of Veterinary Medicine Vienna; Veterinärplatz 1 1210 Wien Austria
3. Neuromuscular Disease Laboratory; Royal (Dick) School of Veterinary Studies; University of Edinburgh; Roslin Midlothian EH25 9RG UK