To be valid, the study needs to examine e-cigarette smokers who have not tried these products before and are trying them for the first time in an attempt to quit smoking. Otherwise, the study cannot truly claim to draw conclusions about how helpful e-cigarettes are for smoking cessation among cancer patients.

Last week, three Democratic lawmakers -- Rep. Henry A. Waxman (CA), Sen. Tom Harkin (IA), and Rep. Peter Welch (VT) -- sent a to the Attorneys General in their states requesting that the AGs declare that electronic cigarettes fall under the terms of the Master Settlement Agreement (MSA) signed in 1998 with the tobacco companies.

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