Authors
Natasa Mihailovic
Center for Informatics and Biostatistics, Institute for Public Health, Kragujevac, Serbia
Nikola Uskokovic
Center for Disease Control and Prevention, Institute for Public Health, Kragujevac, Serbia
Ana Miljanovic
Center for Disease Control and Prevention, Institute for Public Health, Kragujevac, Serbia
Ivana Mitrovic Đorđevic
Primary school Dusan Dugalic, Belgrade, Serbia