Directed acyclic graphs (DAGs) method, a graphical tool which provide a way to visually represent and better understand the key concepts of exposure, outcome, confounding and bias, was applied to identify potential confounders in this study, and the confirmed confounders were then adjusted in multivariable logistic regression analysis
Glycerin and/or propylene glycol are the main constituents in vapour
The captain of the platoon was nearby, and he took a quick swig from his canteen, before turning to Carza
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While these were rare when disposables first took the market by storm, nowadays more and more disposable vapes come in nicotine-free options
Lung Conditions Caused by Smoking While smoking clearly raises the risk of lung cancer , both active and passive smoking also produce numerous other lung disorders that can shorten life span