Author(s):
1. Zdenka Stojanovska, Faculty of Medical Sciences, Goce Delčev University Stip, Macedonia
2. Zoran Ćurguz, Saobraćajni fakultet Doboj, Republic of Srpska, Bosnia and Herzegovina
3. Predrag Kolarž, Institute of Physics, University of Belgrade, , Serbia
4. Zora S. Zunić, University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia