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Recruitment flowchart. The upper bracket depicts how tremor prevalence was determined for the NARCOMS registry over three consecutive semi-annual surveys in fall 2010, spring 2011 and fall 2011. The lower bracket depicts the derivation of the Surveyed Cohort from those registrants with mild or worse tremor who were mailed the supplemental survey. NARCOMS, North American Research Committee on Multiple Sclerosis; TACS, Tremor and Coordination Scale.
