Dartmouth led Study Shows E Cigarette Switching Can Ease Respiratory Symptoms Geisel News Harvard scientist finds microbial contaminants in e cigs Harvard Gazette The Health Effects of Electronic Cigarettes New England Journal of Medicine Differential effects of traditional cigarette, electronic cigarette, and tobacco heating product on human vascular smooth muscle cell phenotypic switch: A comparative functional perspective ScienceDirect E Cigarette Use: Device Market, Study Design, and Emerging Evidence of Biological Consequences