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 In this study, subjects were randomized to one of three 24-week conditions.  At the baseline visit, they receiving either an ENDS  device that used  0, 8 or 36 mg/ml nicotine liquid . Self-reported daily cigarette consumption  were measured at all study visits  (Weeks 1, 2, 4, 8, 12, ). The subjects were supplied replacement nicotine cartridges.  The sponsor used an electronic diary application to track when the cartridge were replaced, and the daily number of cigarettes smoked.  The subject used their normal brand cigarettes , and these were not supplied by the sponsor. Each cartridge was 8 mL. 

Since, the subject regular cigarettes were not supplied by the sponsor, the sponsor elected to report this data as a Concomitant medication, in the CM domain. THe The ENDS device exposure use was represented in EC.        

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