"It was rushed to market without any kind of clinical trials or without any kind of toxicity testing that we would normally have for a food or a drug product released in this country," said Catherine Whitworth, a tobacco treatment specialist at WVU Hospitals. "But it was hurried to the market, and so what we know is that, we don't know a whole lot about the safety or the effectiveness."

http://www.wboy.com/story/20711206/electronic-cigarettes-gaining-popularity