1. Division of Neuropathology; Institute for Pathology; Basel University Hospital; Basel Switzerland
2. Division of Veterinary Medicine; Institute for Animal and Environmental Hygiene; Center for Infection Medicine; Freie Universität Berlin; Berlin Germany
3. Institute for Pathology; University of Berne; Berne Switzerland
4. Sektion für Hygiene und Medizinische Mikrobiologie; Medizinische Universität Innsbruck; Innsbruck Austria
5. Department of Neuroradiology; Basel University Hospital; Basel Switzerland
6. Department of Neurology; Basel University Hospital; Basel Switzerland
7. Department of Infectiology; Lucerne Cantonal Hospital; Lucerne Switzerland
8. Department of Neurosurgery; Basel University Hospital; Basel Switzerland