1. Department of Medicine, Solna, Microbial Pathogenesis Unit, BioClinicum, Karolinska Institutet, Stockholm, Sweden
2. Division of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden
3. Division of Neurology, Karolinska University Hospital, Stockholm, Sweden
4. Department of Laboratory Medicine, Virology Division, University of Washington, Seattle, USA
5. Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
6. Division of Rheumatology, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital, Solna, Sweden