Ferguson, Stuart G Examination of the mechanism of action of two pre-quit pharmacotherapies for smoking cessation. [electronic resource] - BMC public health Dec 2015 - 1268 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1471-2458 Standard No.: 10.1186/s12889-015-2596-2 doi Subjects--Topical Terms: AffectFemaleHumansMaleNicotinic Agonists--administration & dosageResearch DesignSmartphoneSmoking Cessation--methodsSocial EnvironmentSubstance Withdrawal Syndrome--epidemiologyTobacco Use Cessation DevicesVarenicline--administration & dosage