Diener, H C OnabotulinumtoxinA for treatment of chronic migraine: results from the double-blind, randomized, placebo-controlled phase of the PREEMPT 2 trial. [electronic resource] - Cephalalgia : an international journal of headache Jul 2010 - 804-14 p. digital Publication Type: Clinical Trial, Phase III; Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1468-2982 Standard No.: 10.1177/0333102410364677 doi Subjects--Topical Terms: AdolescentAdultAgedBotulinum Toxins, Type A--therapeutic useChronic DiseaseDouble-Blind MethodFemaleHumansMaleMiddle AgedMigraine Disorders--drug therapyNeuromuscular Agents--therapeutic useTreatment OutcomeYoung Adult