1. Department of Medicine III, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic;
2. Center for Cardiovascular Prevention, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic;
3. Department of Medicine II, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic;
4. Department of Medicine II, Faculty of Medicine, Charles University, Pilsen, Czech Republic;
5. Medical Statistics Unit, Institute for Experimental and Clinical Medicine, Prague, Czech Republic