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Nicotine has cleared the body almost entirely, and the brains chemical imbalance is at its most pronounced

Since e-cigarettes are virtually unregulated there is no way to know precisely what chemicals and contaminant might be in the vapors users are inhaling

In fact, the study researchers confirmed that limitations of the study include that cross-border or online cigarette sales in Massachusetts were not accounted for. This admission by the study authors raises the question whether excluding changes in cigarette sales in adjacent states, specifically New Hampshire, Rhode Island and Vermont, was a choice to support their eventual claim that a statewide menthol cigarette sales ban is associated with a significant decline in all cigarette sales to residents of the subject state

We have made some additional small edits to wording and phrasing in the introduction to clarify the aims of our study

According to data from the Center for Disease Control and Prevention, 42% of US adults were smokers in the mid-1960s