Not sure if this got posted yet. Some good comments from Dr. Michael Siegel (at about 10:30 into vid)regarding why ecigs are so effective in helping people quit smoking as compared to other methods(gum,patch,Chantix...)
Here's the link to the study PLOS ONE: EffiCiency and Safety of an eLectronic cigAreTte (ECLAT) as Tobacco Cigarettes Substitute: A Prospective 12-Month Randomized Control Design Study
Here's the link to the study PLOS ONE: EffiCiency and Safety of an eLectronic cigAreTte (ECLAT) as Tobacco Cigarettes Substitute: A Prospective 12-Month Randomized Control Design Study