Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times FDA clears first menthol e cigarette for adults How to Quit Vaping When It's Really, Really Hard SELF Vaping: The new wave of nicotine addiction Cleveland Clinic Journal of Medicine Do e cigarettes kill you? Researchers don't know. Vox New Study Highlights Increased Sales of E Cigarettes in Flavors Appealing to Youth CDC Foundation