1. Department of Anesthesiology and Intensive Care Medicine, University Hospital Hradec Kralove, Charles University in Prague, Faculty of Medicine in Hradec Kralove, Hradec Kralove, Czech Republic
2. Dalhousie University, Department of Anesthesia, Halifax, Canada
3. Department of Surgery, University Hospital Hradec Kralove, Charles University in Prague, Faculty of Medicine in Hradec Kralove, Hradec Kralove, Czech Republic