Karolinska Institutet - Department of Clinical Neuroscience, University of Copenhagen - Department of Pediatrics, Karolinska Institutet - Neuroimmunology Unit, Karolinska Institutet, Aarhus University Hospital - Department of Neurology, University of Southern Denmark - MS Clinic Southern Denmark, University of Copenhagen - Rigshospitalet, University of Copenhagen - Rigshospitalet, Karolinska Institutet - Department of Clinical Neuroscience and Sahlgrenska University Hospital - Department of Neurology

University of Copenhagen - Department of Pediatrics, University of Southern Denmark - National Institute of Public Health, University of Copenhagen - Department of Pediatrics, University of Copenhagen - Department of Pediatrics, University of Copenhagen - Department of Pediatrics, University of Copenhagen - Department of Pediatrics and University of Copenhagen - Section of Biostatistics