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Author(s):
1. Đorđe Mirjanić, JZU Dom zdravlja Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
2. Jovan Vojinović, University Business Academy Novi Sad, Faculty of Dental Medicine in Pancevo,
Republic of Srpska, Bosnia and Herzegovina
3. Vladan Mirjanić, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
4. Marija Vuletović, Građevinski fakultet, Beograd, Serbia