1. Division of Neurological Sciences, Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern CH-3001, Switzerland
2. Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern CH-3001, Switzerland
3. Institute of Veterinary Bacteriology, Department of Infectious Diseases and Pathobiology, University of Bern, Bern CH-3001, Switzerland