1. Professor of Anaesthesia, Department of Anaesthesia, University of Toronto, Toronto, Ontario, Canada.
2. Assistant Professor, Laboratoire de Recherche Neurologique, Institut de Physiologie et Service de Neurologie, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
3. Professor of Anaesthesiology, Department of Anaesthesiology and Critical Care Medicine, Sion Hospital, Sion, Switzerland.
4. Laboratory Technician, Service d'Anesthesiologie et de Réanimation, Centre Hospitalier Universitaire Vaudois.
5. Professor of Physiology, Laboratoire de Recherche Neurologique, Institut de Physiologie et Service de Neurologie, Centre Hospitalier Universitaire Vaudois.