Juul will stop selling most flavored e cigarettes in retail stores, source says Los Angeles Times Population Based Disease Odds for E Cigarettes and Dual Use versus Cigarettes NEJM Evidence F.D.A. Moves to Restrict Flavored E Cigarette Sales to Teenagers The New York Times E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA Vaping: The new wave of nicotine addiction Cleveland Clinic Journal of Medicine A Randomized Trial of E Cigarettes versus Nicotine Replacement Therapy New England Journal of Medicine