Author(s):
1. Radmila Arbutina, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
2. Natasa Trtic, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
3. Ognjenka Janković,
Republic of Srpska, Bosnia and Herzegovina
4. Valentina Veselinović,
Republic of Srpska, Bosnia and Herzegovina