1. 3Ear, Nose and Throat Clinic, Charles University in Prague, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, 500 05, Hradec Králové, Czech Republic
2. 4Faculty of Economics and Administration, Institute of Mathematics, University of Pardubice, 532 10, Pardubice, Czech Republic
3. 5Institute of Pathophysiology, Charles University in Prague, Faculty of Medicine in Hradec Králové, 500 038, Hradec Králové, Czech Republic