E Cigarette Use: Device Market, Study Design, and Emerging Evidence of Biological Consequences Comparative effects of alternate tobacco products and traditional tobacco smoking on various organ systems: A guide to regulators and health policy makers ScienceDirect Health impact of E cigarettes: a prospective 3.5 year study of regular daily users who have never smoked Scientific Reports Frontiers Electronic cigarette use and consumption patterns in medical university students PET imaging shows greater lung inflammation in e cigarette users than cigarette smokers E cigarettes and smoking cessation among adolescent smokers Scientific Reports