As a medical doctor who chose a career in artificial heart technology rather than clinical practice, I decided not to take an internship, which is required for licensing. Instead, I work with invention, manufacturing, regulatory affairs, and clinical application of artificial hearts.

I am a medical scientist, not a practical physician. I think it's very upfront. I am a doctor. I have long experience with heart disease.

I am, in fact, a medical doctor; I am a world expert in mechanical heart technology; and I am an athletically fit man who takes care of his own health through diet and exercise, including frequent five mile runs.

As spokesman for Lipitor, I have been an advocate of preventive medicine in addition to my work with the Jarvik 2000 Heart, which has rescued people from death and sustained a patient with a normal, mobile lifestyle for seven and a half years - the longest in the world.

There is a clear matter that I am not a practicing physician; I have never been a practitioner; everybody has known for decades.

Lipitor is one of the most researched medicines. I'm glad I take Lipitor, as a doctor, and a dad.

I do not practice clinical medicine and hence do not treat individual patients. My career is in medical science.