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Goodin DS, Ebers GC, Cutter G, et al. Cause of death in MS: longterm follow-up of a randomised cohort, 21 years after the start of the pivotal IFNβ-1b study. BMJ Open 2012:2:e001972. In table 3 of this paper, the figures in the row “Expected in null condition” should be ‘23’ and not ‘33’ (in order to add up to 69).

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