penn state e cigarette dependence index Adaptation and Psychometric Properties of the Electronic (ECDI) in a Colombian Sample Vaping May Reduce Smoking Without
Vaping May Reduce Smoking Without Increasing Dependence Tobacco Reporter Development of a Questionnaire for Assessing Dependence on Electronic Cigarettes Among a Large Sample of Ex Smoking E cigarette Users PMC An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link Penn State study: Vapers report less dependence, addiction than cigarette smokers WHYY
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