1. Department of Infectious Diseases, University Hospital Mostar, Mostar, Bosnia and Herzegovina
2. School of Medicine, University of Mostar, Mostar, Bosnia and Herzegovina
3. Department of Otorhinolaryngology and Maxillofacial Surgery, University Hospital Mostar, Mostar, Bosnia and Herzegovina
4. Department of Epidemiology and Public Health, Public Health Institute of Livno, Livno, Bosnia and Herzegovina
5. Department of Radiology, University Hospital Mostar, Mostar, Bosnia and Herzegovina
6. Department of Epidemiology, Public Health Institute of Federation of Bosnia and Herzegovina, Sarajevo, Bosnia and Herzegovina