Are you serious?
Why should anyone waste their time studying why people smoke for scores of years and never get lung cancer?
Where's the fun in that?
On the other hand, I do have a question for your soon to be "ex" doctor:
How is it possible that of the ten documented longest-lived people, nine smoked past age 100 (both male and female)?
Exactly. And when they cure death, I might consider not smoking. heh!