1 Department of Anesthesia and Intensive Care Medicine, Faculty of Medicine in Plzen, Charles University; Department of Anesthesia and Intensive Care Medicine, University Hospital Plzen; and Biomedical Center, Faculty of Medicine in Plzen, Charles University, Plzeň, Czech Republic.
2 Department of Anesthesia and Intensive Care Medicine, Faculty of Medicine in Plzen, Charles University; and Department of Anesthesia and Intensive Care Medicine, University Hospital Plzen, Plzeň, Czech Republic.