1 Applied Immunology and Immunotherapy, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital, Solna, Sweden.
2 Neuroepidemiology with focus on MS, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
3 Medical Unit Neurology, Karolinska University Hospital, Stockholm, Sweden.