1. Servei de Neurologia-Neuroimmunologia, Centre d’Esclerosi Múltiple de Catalunya (Cemcat), Institut de Recerca Vall d’Hebron (VHIR), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
2. Departments of Neurology and Immunology, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigacion Sanitaria, Madrid, Spain
3. Department of Neurology, Medical University of Lublin, Lublin, Poland
4. MS Center (City Clinical Hospital 31), Saint Petersburg, Russia
5. First Pavlov Saint-Petersburg State Medical University, Saint-Petersburg, Russia
6. Neurology Clinic, Clinical Centre of Serbia, Belgrade, Serbia
7. Neuroimmunology Unit, Hospital Universitario Puerta de Hierro, Madrid, Spain
8. Department of Neurology, Charles University in Prague, First Faculty of Medicine, Prague, Czech Republic
9. Center of Neuroimmunology, Service of Neurology, Hospital Clinic and Institut d'Investigacions Biomèdiques August Pi Sunyer (IDIBAPS), Barcelona, Spain
10. Hospital Clínico San Carlos, Servicio de Neurología, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
11. Department of Neurology, Neuroimmunological Section, University of Rostock, Rostock, Germany
12. University of Milan, Fondazione Ca’ Granda, IRCCS Ospedale Policlinico, Milan, Italy
13. Unitat de Neuroimmunologia i Esclerosi Múltiple, Servei de Neurologia, Hospital Universitari Dr. Josep Trueta, Institut d'Investigació Biomèdica de Girona (IDIBGI), Girona, Spain
14. Medical University of Innsbruck, Department of Neurology, Innsbruck, Austria
15. Unitat d’Estadística i Bioinformàtica, VHIR, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
16. Genetics, Microbiology and Statistics Department, Universitat de Barcelona, Barcelona, Spain