Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health E cigarettes: A win or loss for public health? Knowable Magazine The Synthetic Nicotine Loophole Fueling a Return to Teenage Vaping The New York Times E cigarettes should be on sale in hospital shops, health body says Vaping The Guardian Vapes '95% safer' than cigarettes messaging backfired