Examining the sources of evidence in e cigarette policy recommendations: A citation network analysis of international public health recommendations PLOS One MENTHE GLACIALE E LIQUIDE FRAIS cazavape Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results are e cigarettes unsafe? SiOWfa15: Science in Our World: Certainty and Controversy Health System News New E cigarette Use Guidance and Recommendations for Health Practitioners