1. Professor, Institute of Anesthesiology, Catholic University, Nijmegen, The Netherlands, and Institute of Clinical Experimental Anesthesia, State University of Groningen, Groningen, The Netherlands.
2. Staff member, Institute of Anesthesiology, Catholic University, Nijmegen.
3. Senior Research Associate, Institute of Anesthesiology, Catholic University, Nijmegen, and Institute of Clinical Experimental Anesthesia, State University of Groningen.
4. Professor and Chairman, Institute of Anesthesiology, Catholic University, Nijmegen.