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Dr. Oh has received grants from Biogen-Idec, Roche, and EMD-Serono; consulting fees from Biogen-Idec, EMD-Serono, BMS, Novartis, Eli-Lilly, Sanofi, and Roche; payment or honoraria from EMD-Serono, Biogen-Idec, Novartis, Roche, and Sanofi; participation on a Data Safety Monitoring or Advisory Board for Biogen-Idec, EMD-Serono, Roche, Novartis, and Sanofi; and leadership or fiduciary role as Chair of the Medical Advisory Committee for the MS Society of Canada during the conduct of this study. Dr. Feinstein has received grants from MS Canada, CIHR, and Bristol Myers Squibb; royalties from Johns Hopkins University Press and Cambridge University Press; and honoraria from Novartis, Roche, and Merck.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflicts of interest"}},{"value":"This retrospective chart review study involving human participants was performed in line with the principles of the Declaration of Helsinki. 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