Author(s):
1. Marija Obradović, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
2. Olivera Dolić, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
3. Slava Sukara, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina