1. Thrombotic Centre of Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital, Karlovo Namesti 32, 121 11 Prague 2, Czech Republic
2. Central Hematological Laboratory of Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine of Charles University, Prague, Czech Republic
3. Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital and 1st Faculty of Medicine of Charles University, Prague, Czech Republic
4. 1st Department of Surgery, General University Hospital and 1st Faculty of Medicine of Charles University, Prague, , Czech Republic
5. Institute for Clinical and Experimental Medicine, Cardiovascular Surgery Dept., Prague, Czech Republic