>> as i was watching your show, one night when you had michael on. michael milken. >> larry: prostate cancer. >> prostate cancer. and it was before i had received word that i had cancer. it was only one day before i received word. and i called you, i received word, and within a matter of hours i called you to see if i could get the information on that doctor with his diet. and figure out a way to give up smoking. >> larry: before we pick it up with what michael wanted to say, dr. gupta, do we know why jim gets it and john doesn't? >> well, it's an interesting question. a lot of people subscribe to the idea that you may be born with some sort of predisposition, if you will, some likelihood of getting cancer. and then something in the environment, or something that you've done to your own body in some way may sort of cause the cancer to actually happen.