1 Medical Intensive Care Unit, University Clinical Centre of the Republic of Srpska, dvanaestbeba bb, 78000, Banja Luka, Bosnia and Herzegovina. pedja.kovacevic@med.unibl.org.
2 Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina. pedja.kovacevic@med.unibl.org.