Author(s):
1. Ognjenka Janković, Republic of Srpska, Bosnia and Herzegovina
2. Radmila Arbutina, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
3. Renata Josipović, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
4. Igor Đukić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina