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Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Ortho-McNeil Neurologics, Inc.
Intervention Model: Parallel Assignment
Primary Purpose: Prevention
Change in the average number of days per month with migraine or migrainous headache by daily headache record.
Absolute change and % change from baseline in the headache index; change in the average daily and worst daily headache severity; quality of life assessments (MIDAS, MSQ, Physician's/Subject's global assessments of change.