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A study of a new treatment for migraine headaches was conducted using a sample of 300 adults with documented history of migraine headache. The primary

A study of a new treatment for migraine headaches was conducted using a sample of 300 adults with documented

history of migraine headache. The primary outcome was the occurrence of at least one migraine headache episode

during the study period. The summary data are shown below, stratified by age.

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