The Safer Cigarette

I found the most fascinating article. The article is about the elevated risk of lung cancer in American men compared to Japanese men. It is interesting article because there is a higher smoking prevalence in Japanese men, but they have a lower risk of lung cancer compared to American men.
First thing the article addresses is genetics; perhaps Caucasians are genetically disposed to lung cancer compared to the Japanese men. This theory was wrong because rates of Japanese born Americans and Japanese immigrants were the same as American men, so genetics is not the main factor. The mean duration of smoking for the American and Japanese men was the same. The next thing that was evaluated was the age of smoking of the American and Japanese men...

http://islaslab.blogspot.nl/2011/05/safer-cigarette.html