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ES and SB have received research supports from the Italian Ministry of Health. ND-M and MS have received compensation for speaking activities. VK has received speaker honoraria from Roche and Alkaloid and receives research supports from the Swiss Pharm and Serbian Ministry of Education Science, and Development and Serbian Academy of Sciences and Art. MF is Editor-in-Chief of the <i>Journal of Neurology<\/i>, Associate Editor of <i>Human Brain Mapping<\/i>, <i>Neurological Sciences,<\/i> and <i>Radiology<\/i>; received compensation for consulting services from Alexion, Almirall, Biogen, Merck, Novartis, Roche, Sanofi; speaking activities from Bayer, Biogen, Celgene, Chiesi Italia SpA, Eli Lilly, Genzyme, Janssen, Merck-Serono, Neopharmed Gentili, Novartis, Novo Nordisk, Roche, Sanofi, Takeda, and TEVA; participation in Advisory Boards for Alexion, Biogen, Bristol-Myers Squibb, Merck, Novartis, Roche, Sanofi, Sanofi-Aventis, Sanofi-Genzyme, Takeda; scientific direction of educational events for Biogen, Merck, Roche, Celgene, Bristol-Myers Squibb, Lilly, Novartis, Sanofi-Genzyme; he receives research support from Biogen Idec, Merck-Serono, Novartis, Roche, Italian Ministry of Health, and Fondazione Italiana Sclerosi Multipla. FA is Section Editor of <i>NeuroImage: Clinical<\/i>; has received speaker honoraria from Biogen Idec, Roche, Eli Lilly, Zambon and Italfarmaco; and receives or has received research supports from the Italian Ministry of Health, Italian Ministry of University and Research, AriSLA (Fondazione Italiana di Ricerca per la SLA), the European Research Council and Foundation Research on Alzheimer Disease.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflicts of interest"}},{"value":"Approval was received from the local Ethics Standards Committee on Human Experimentation of Faculty of Medicine, University of Belgrade, Serbia (protocol ID: 231368) and written informed consent was obtained from all subjects participating in the study.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}