1. Department of Neurology and Neurosurgery University of Tartu Tartu Estonia
2. Department of Neurology Medical University Innsbruck Innsbruck Austria
3. Department of Clinical and Experimental Medicine and Department of Infectious Diseases Linköping University Linköping Sweden
4. Department of Microbiology University of Tartu Tartu Estonia
5. Department of Neurology Sørlandet Hospital Kristiansand Norway
6. Department of Clinical Medicine University of Bergen Bergen Norway
7. Institute of Neurology Psychiatry and Narcology of the National Academy of Medical Sciences of Ukraine Kharkiv Ukraine
8. Department of Infectious Diseases University Medical Centre Ljubljana Ljubljana Slovenia
9. Department of Neurology Rabin Medical Center Petach Tikva Israel