1. First Faculty of Medicine, Charles University, 169 02 Prague, Czech Republic
2. University Military Hospital Prague, 168 02 Prague, Czech Republic
3. Third Faculty of Medicine, Charles University, 100 00 Prague, Czech Republic
4. Institute of Haematology and Blood Transfusion, 120 00 Prague, Czech Republic
5. Faculty of Military Health Sciences, University of Defence, 500 02 Hradec Kralove, Czech Republic