1. Lector and Chairman, Department of Anesthesiology, University of Nijmegen, The Netherlands.
2. Fellow in Anesthesia, University of Pennsylvania School of Medicine, Philadelphia.
3. Postdoctoral Fellow, Department of Anesthesia, University of Pennsylvania School of Medicine, Philadelphia, supported by U.S.P.H.S. Research Training Grant 5-T1-GM-215–07.
4. Senior Fellow, Department of Anesthesiology, University of Nijmegen, The Netherlands.