1. Staff Anesthesiologist, University of Leiden Hospital. Present address: Emmastraat 7,6131 JV Sittard, The Netherlands.
2. Medical Student, University of Leiden Hospital.
3. Visiting Research Professor (sabbatical leave). Professor of Anesthesiology and Pharmacology, Emory University Medical School and The Emory Clinic.
4. Visiting Research Professor (sabbatical leave), Associate Professor of Anesthesia and Medicine (Clinical Pharmacology), Palo Alto Veteran's Administration Medical Center.