1. University of Kragujevac , Serbia , Faculty of Medical Sciences
2. University of defense, Military Medical Academy , Medical Faculty , Belgrade , Serbia
3. University of Kragujevac , Serbia , Faculty of Medical Sciences, Department of Infectious and tropic diseases
4. University Clinical Center “Kragujevac” , Kragujevac , Serbia
5. University of Kragujevac , Serbia , Faculty of Medical Sciences, Department of Radiology
6. University of Belgrade , Serbia , Medical Faculty, Department of Radiology