1. Department of Epidemiology, Faculty of Military Science, University of Defence, 500 01 Hradec Králové, Czech Republic
2. Department of Anesthesiology and Intensive Care, First Faculty of Medicine, Charles University and Thomayer University Hospital, 140 59 Prague, Czech Republic
3. Department of Clinical Biochemistry, Hematology and Immunology, Na Homolce Hospital, 150 00 Prague, Czech Republic