1. Staff Anesthesiologist.
2. Staff Anesthesiologist, Department of Anesthesiology, Krankenhaus Spittal/Drau, Spittal/Drau, Austria.
3. Professor, Department of Statistics, University of Klagenfurt, Klagenfurt, Austria.
4. Associate Professor, Department of Anesthesiology, Landeskrankenhaus Klagenfurt, Klagenfurt, Austria.