1. Visiting Research Fellow, Department of Anesthesia & Critical Care, The University of Chicago.
2. Assistant Professor of Anesthesia & Critical Care, The University of Chicago.
3. Professor & Vice Chairman for Research, Department of Anesthesia & Critical Care, The University of Chicago.
4. Assistant Professor of Anesthesia, University of California, San Francisco.
5. Visiting Research Fellow, University of Manitoba, Winnipeg, Canada.
6. Professor and Chairman of Anesthesia and Professor of Pharmacology, The University of California, San Francisco.