E cigarettes are unregulated, health officials scrutinize use > Air Force Medical Service > News Predicting the pulmonary effects of long term e cigarette use: are the clouds clearing? European Respiratory Society Former Smokers Who Quit Within the Past Year Are Four Times More Likely to be Daily Users of E Cigarettes Respiratory Therapy E cigarettes are unregulated, health officials scrutinize use > Air Force Medical Service > News What are electronic cigarettes (e cigarettes)? Simple and Practical Mental Health Harvard scientist finds microbial contaminants in e cigs Harvard Gazette