1. Institute of Genetics, Vetsuisse Faculty; University of Bern; 3001 Bern Switzerland
2. Instituto de Genética Veterinaria (IGEVET); CCT La Plata - CONICET - Facultad de Ciencias Veterinarias; Universidad Nacional de La Plata (UNLP); CP1900 La Plata, Buenos Aires Argentina
3. Division of Clinical Neurology; Department of Clinical Veterinary Medicine; Vetsuisse Faculty; University of Bern; 3001 Bern Switzerland