Author(s):
1. Radmila Arbutina, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
2. Nataša Trtić, Faculty of Medicine, University of Banjaluka, Republic of Srpska, Bosnia and Herzegovina
3. Ognjenka Janković, Republic of Srpska, Bosnia and Herzegovina
4. Vladan Mirjanić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
5. Valentina Veselinović, Republic of Srpska, Bosnia and Herzegovina