Author(s):
1. Marija Obradović, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
2. Olivera Dolić, Republic of Srpska, Bosnia and Herzegovina
3. Jovan Vojinović, University Business Academy Novi Sad, Faculty of Dental Medicine in Pancevo, Republic of Srpska, Bosnia and Herzegovina
4. Slava Sukara, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina