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Limitations include the application of ever use in operationalizing the e-cigarette exposure, precluding investigation of doseresponse associations between level of e-cigarette use and odds of becoming an ever smoker, and the omissions of some covariates that may provide a more comprehensive adjustment for endogenous liability to smoking (e.g., sensation seeking, depression)

The oldest (above 65) and youngest (under 5) populations are most at risk of complications

Tried key on and off just in case

Further controlled studies are needed before drawing conclusions about whether altering macronutrient intake can improve cessation outcomes.

But cigarette smoke sensors