1. Department of Preventive Medicine and Epidemiology, Vall d’Hebron Barcelona Hospital, Barcelona, Spain Multiple Sclerosis Centre of Catalonia (Cemcat), Vall d’Hebron Barcelona Hospital, Barcelona, Spain
2. CRC-SEP Nice, CHU de Nice, Universite’ Nice Cote d’Azur UR2CA-URRIS, Nice, France
3. Fundación Santa Fe de Bogotá, Bogotá, Colombia School of Medicine, Universidad de los Andes, Bogotá, Colombia Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
4. Department NEUROFARBA, University of Florence, Florence, Italy IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
5. Department of Preventive Medicine and Epidemiology, Vall d’Hebron Barcelona Hospital, Barcelona, Spain
6. Centro para la Investigación de Enfermedades Neuroinmunológicas (CIEN), FLENI, Buenos Aires, Argentina
7. Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy Neurology Unit, Neurorehabilitation Unit, and Neurophysiology Service, IRCCS San Raffaele Scientific Institute, Milan, Italy Vita-Salute San Raffaele University, Milan, Italy
8. Department of Paediatric Neurology, Great Ormond Street Hospital for Children, London, UK Department of Neuroinflammation, Queen Square Multiple Sclerosis Centre, UCL Institute of Neurology, London, UK
9. Department of Neurology, Klinikum Rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
10. Multiple Sclerosis International Federation, London, UK
11. Department of Neurology, Danish Multiple Sclerosis Center and the Danish Multiple Sclerosis Registry, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
12. Department of Neurology, Hospital Clínico San Carlos, IdISSC, Departamento de Medicina, Universidad Complutense, Madrid, Spain
13. Department of Neurology, School of Medicine, Istanbul University Cerrahpasa, Cerrahpasa, Istanbul, Turkey
14. Service de Neurologie, Sclérose en Plaques, Pathologies de la Myéline et Neuro-inflammation, Centre de Référence des Maladies Inflammatoires Rares du Cerveau et de la Moelle, Hôpital Neurologique Pierre Wertheimer, Hospices Civils de Lyon, Lyon, France
15. Centre des Neurosciences de Lyon, Observatoire Français de la Sclérose en Plaques, INSERM 1028 et CNRS UMR5292, Lyon, France Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, Lyon, France
16. Multiple Sclerosis Centre of Catalonia (Cemcat), Vall d’Hebron Barcelona Hospital, Barcelona, Spain