William Clayton Petty, MD, has had a distinguished career in the United State military and also became a well-known national and international expert in anesthesia machines, safety in anesthesia, a...view moreWilliam Clayton Petty, MD, has had a distinguished career in the United State military and also became a well-known national and international expert in anesthesia machines, safety in anesthesia, and anesthesia for trauma. Retired, Petty teaches the history of medicine classes at the local university. He lives in Cedar City, Utah.view less