Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times The Truth About Electronic Nicotine Delivery Devices An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link Bigger, stronger, and cheaper: Disposable e cigarettes have more nicotine and are more accessible than ever Population Based Disease Odds for E Cigarettes and Dual Use versus Cigarettes NEJM Evidence