1. Professor, Department of Anesthesia, University of Utah.
2. Research Fellow, Department of Anesthesiology, University of Kansas. Present address: Professor and Chairman, Department of Anesthesiology, Kochi Medical School, Nangoku-Shi, Kochi-Ken 781–51, Japan.
3. Professor and Chairman, Department of Anesthesiology, University of Kansas.
4. Associate Professor, Department of Anesthesia, University of Utah.