1. Department of Veterinary Clinical Medicine; University of Illinois; 1008 W. Hazelwood Dr Urbana IL 61802 USA
2. Department of Veterinary Neurology and Neurosurgery, Anderson Moores Veterinary Specialists; The Granary, Bunstead Barns; Poles Lane, Hursley, Winchester Hampshire SO21 2LL
3. Veterinary Diagnostic Imaging, Small Animal Teaching Hospital, School of Veterinary Science; University of Liverpool; Leahurst Campus Neston CH64 7TE
4. Vet-Extra Neurology; Broadleys Veterinary Hospital; Stirling FK7 7LE
5. Department of Veterinary Neurology; University of Nottingham, Pride Veterinary Centre; Pride Park Derby DE24 8HX