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However, the stress levels of adult smokers are slightly higher than those of nonsmokers

A test of the stress-buffering model of social support in smoking cessation: is the relationship between social support and time to relapse mediated by reduced withdrawal symptoms

Nicotine intake soon after waking up

Without adding any more dangerous substances, they function by activating nicotine receptors in the brain to prevent withdrawal symptoms

"Fuhrman's folly"

There are thousands of measurements from devices on the market. His 2014 e-cigarette data review concluded that contaminants pose no apparent concern to bystanders