Author(s):
1. Nataša Trtić, Republic of Srpska, Bosnia and Herzegovina
2. Tijana Adamovic, Republic of Srpska, Bosnia and Herzegovina
3. Valentina Veselinović, University of Banja Luka, Medical Faculty, Republic of Srpska, Bosnia and Herzegovina
4. Radmila Arbutina, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
5. Zeljka Kojic, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina