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Social Studies, 22.08.2019 00:20 bcruz310

Adults with more than a twelve (12)-month history of migraines were assigned randomly in a double-blinded study to receive treatment with experimental drug x (10 or 20 mg/day) or placebo. the primary efficacy measure was the reduction in severity of the migraine attacks. enrollment was twelve-hundred (1200) subjects. what best describes the clinical phase of this study?

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