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Each exhale should take twice as long as the inhale, which is called 1:2 breathing

Among US smokers, exposure to tweets that e-cigarettes are completely harmless was associated with higher post-test intention to purchase e-cigarettes (=0.229, 95% CI 0.002 to 0.456, p=0.048) and lower post-test perceived relative harm of e-cigarettes (=0.154, 95% CI 0.258 to 0.050, p=0.004)

"Our industry is not here to encourage smoking, but it offers dedicated smokers already addicted to the product an opportunity to make their own product at a reduced cost

E-cigarettes are still relatively new products on the market and our understanding of their oral health impacts is still in development