1. Besa Meditor Primary Healthcare Centre , Oslomej , Kičevo , North Macedonia
2. University of Niš Faculty of Medicine , Department of Occupational Health , Niš , Serbia
3. University of Belgrade Institute for Medical Research , National Institute of Republic of Serbia, Centre of Research Excellence in Nutrition and Metabolism , Belgrade , Serbia
4. University Clinical Centre Niš , Clinic of Plastic Surgery , Niš , Serbia
5. Institute of Occupational Medicine , Niš , Serbia