FDA OKs First Vaping Products as Smoking Cessation Aids RT E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State Health News Electronic cigarettes for smoking cessation The BMJ How to quit smoking with e cigarettes N1 Vapeshop in DENVER AURORA COLORADO L'efficacit des cigarettes lectroniques dans le sevrage tabagique E cigarettes should be offered to smokers, say doctors BBC News