Electronic cigarette Wikipedia E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State University E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA What are e cigarettes and the controversies that surround them? On Medicine With Commissioner Under Pressure, F.D.A. Opens Door to Flavored Vapes The New York Times E Cigarettes & HTPs: Health Risks & Impact Tobacco Atlas