1. Instructor in Anesthesia, University of Pennsylvania; present address, Department of Anesthesia, Clinical Center, National Institutes of Health, Bethesda, Maryland 20014
2. Associate Professor of Anesthesia, University of Pennsylvania
3. Professor of Anesthesia and Pharmacology, University of Pennsylvania
4. Instructor in Anesthesia, University of Pennsylvania; present address, 8731 Mantecito, Scottsdale, Arizona 85251