Dr. David Hepburn - Stop Smoking Did you know that there are approximately more than one billion smokers in the world? Despite all the data on this unpleasant vice today there are many people who still can not leave it. If you are a smoker who is trying to quit, listen to what Dr. David Hepburn and Dr. Robert Sealey have to tell you. While there are many methods to quit smoking, few are functional. That is why Dr. David Hepburn gives you the following recommendations. Dr. David Hepburn. Dr. David Frederick Hepburn. Dr. Hepburn. davidfrederickhepburn.com