1 Department of Social Medicine, Institute of Public Health Kragujevac Kragujevac, Serbia.
2 Department of Social Medicine, Institute of Public Health KragujevacKragujevac, Serbia; Department of Social Medicine, Faculty of Medical Sciences, University of KragujevacKragujevac, Serbia.
3 Faculty of Medicine, Institute for Medical Statistics and Informatics, University of Belgrade Belgrade, Serbia.
4 Health Economics and Pharmacoeconomics, Faculty of Medical Sciences, University of Kragujevac Kragujevac, Serbia.