E cigarettes: How they work, risks, and research Report: More Than One in Ten Young Adults Uses E cigarettes Patient Care Vaping on the rise: Colorado youth use e cigarettes at twice the national average VailDaily.com New Research on E Cigarette Use Reveals Positive Public Health Trends E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State University Vaping Percentages UW CTRI UWMadison