1. University of Banja Luka, Faculty of Medicine, Banja Luka, Bosnia and Herzegovina + Clinical Center Banja Luka, Department of Histology and Embriology, Banja Luka, Bosnia and Herzegovina
2. University of Banja Luka, Faculty of Medicine, Banja Luka, Bosnia and Herzegovina + Clinical Center Banja Luka, Department of Pathology, Banja Luka, Bosnia and Herzegovina
3. University of Banja Luka, Faculty of Medicine, Banja Luka, Bosnia and Herzegovina + Clinical Center Banja Luka, Clinic of Neurology, Banja Luka, Bosnia and Herzegovina