My wife (yes an RN) drew this picture. Now bear in mind that the CO24U license plate refers to the fact that the mountain is made of limestone and with a heavy rain the CO2 load will increase, not that he'll fall asleep at the wheel and stop breathing.............
Below is a link to an online Power Point Presentation. This is the talk I have given at RT conferences in Tahoe, New Mexico, Michigan, and, most recently, Seattle. Upcoming will be a document one can print to go along with the presentation. It takes a while to load up, so make a cup of coffee and come back later....
My email is whitnack@pacbell.net