1 package of marlboro cigarettes Vintage 100's Cigarette Pack | Original Empty Marlboro Box USA | Brown & White Design | No Tobacco Included, Iconic Logo Box, Empty Marlboro Red Special Blend 100s

The liquid chemical mixture (also known as e-liquids or vape juices) contains nicotine (a highly addictive substance found in other tobacco products), propylene glycol (a food additive but known irritant when inhaled) and many other harmful chemicals also found in conventional cigarettes

Manufacturers have to submit proof to the agency that their devices are safe and effective to be approved as a method to help people stop smoking

[3,4] For information on how to quit, see this article

Continuous variables were presented as means and standard deviations, while categorical variables were shown as frequencies and percentages