I smoked from the age of 18 to 29. I told myself I'd quit before I hit 30, and so I did. I am now 48yrs. old (49 next mo), so that was 18 yrs. ago that I quit. Every doctor I told, didn't seem concerned since I quit so long ago. They tell you to quit, which I did and still got it. Hey, who knows what caused this?? As for drinking, I'd say I'm a social drinker. Maybe a beer or glass of wine once a week. I've only had one glass of wine since treatment ended. I have read that there is a high recurrance rate for people who drink heavily. But again, there are so many other things all of us are exposed to in everyday life.