1. Professor of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida 32601
2. Professor, Department of Anesthesia and Associate, Cardiovascular Research Institute, University of California Medical Center, San Francisco, California 94122, and Adjunct Professor, Department of Anesthesia, University of California, San Diego, California 92103.
3. Computer Center, University of Virginia Medical Center, Charlottesville, Virginia 22901