as well as cigarette smoking as an additional one
,,, there was a time when this was the main one.
Not according to the Framingham heart study. It's the longest running one out there and they've yet to find any direct co relation.
Much research points to lower risks of cancer among smokers, including lung cancer.
But we all knew that, it's on the MSM daily.
Huh? I searched through their website ...
http://framingham.com/heart/
... and didn't see any articles that points to lower cancer risks in smokers.