E Cigarettes May Be Independently Linked to Erectile Dysfunction, New Research Finds NYU Langone News E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State University FDA authorizes first e cigarette, cites benefit for smokers PBS News E cigarettes: Facts, stats and regulations E cigarettes: effective cessation tool or new gateway to smoking tobacco? UICC Vaping Related Illness and Lung Disease NEJM