While self-reported measures of cigarettes per day (CPD) and when the participants smoked their last cigarette are relatively standard questionnaire items, they are flawed as proxies for measuring dose exposure
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Vitamin E acetate was being used to mix THC (the psychoactive component in cannabis) into e-liquids
Sept 15, 2014 : Thanks Onur Demirsoy, for nice favicon ;) May 4, 2013 : I apologize for downtime, disk got full, had to redone server a bit
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The smoke lingers in the air, clings to surfaces, and remains hazardous long after the cigarette is extinguished