1. University of Priština-Kosovska Mitrovica, School of Medicine, Dental Clinic, Kosovska Mitrovica, Serbia
2. University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Belgrade, Serbia;
3. University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
4. University of Belgrade, School of Dental Medicine, DentalNet Research Group, Belgrade, Serbia