1 Department of anesthesiology and intensive care medicine, St. Anne´s University Hospital, Pekarska 664/53, Brno, 656 91, Czech Republic. sitinmic@gmail.com.
2 Department of Biostatistics, International Clinical Research Center, St. Anne´s University Hospital, Pekarska 664/53, Brno, 656 91, Czech Republic. sitinmic@gmail.com.