1. Department of Veterinary Clinical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (Bologna), Italy
2. Department of Clinical Veterinary Sciences, Neurology Service, University of Helsinki, Finland
3. Department of Veterinary Medicine Diagnostic Imaging Section
4. Department of Veterinary Medicine Neurology Section, University of Bern, Bremgartenstrasse 109a, 3012 Bern, Switzerland