Carbon monoxide is toxic. This doctor is out to prove it's also therapeutic
Dr. Augustine Choi (news.weill.cornell.edu)

NEW YORK - Carbon monoxide is a poison. Can it also be a medicine? Dr. Augustine Choi has spent two decades trying to figure that out. And he's inching toward a surprising answer: Yes. Most of the research so far has been conducted in animals; just a few early-stage clinical trials are underway in patients. But…