I'm not an analyst of data, but I am a good physician. I can go back historically and answer your question a little bit.
Several years ago, in the mid-1990s, there was a study done. It was called the NASCET trial. It looked at strokes in patients with blocked arteries in the neck. It was done in conjunction with neurology. The study was aborted, because we found that conservative management, that is, medical management, of carotid artery pathology resulted in strokes, and if we operated, the patient seemed to have significantly fewer strokes. From that perspective, there can be science that can be done that can be aborted in the interest of the patient.
I would like to go back just for a second, if I may, to cost. I'll allude specifically to one patient we treated. His name is Steve. He was virtually unemployable because he had so much fatigue. He had his angioplasty done. Since he's had his angioplasty done, he no longer has a caregiver, no longer lives in supported government housing, has stopped taking his drugs, much against my advice, and is going to send his wheelchair back. He says that he is saving the taxpayer $4,000 a month.