E cigarettes and harm reduction: An evidence review RCP What are e cigarettes? Review this graphic for more information. Lawsuit challenges FDA delay of e cigarette review WHYY Vaping companies sue to delay U.S. e cigarette review Los Angeles Times E cigarettes: Facts, stats and regulations A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews