AUTHOR=Janicijevic Katarina M. , Kocic Sanja S. , Radevic Svetlana R. , Jovanovic Mirjana R. , Radovanovic Snezana M. TITLE=Socioeconomic Factors Associated with Psychoactive Substance Abuse by Adolescents in Serbia JOURNAL=Frontiers in Pharmacology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2017.00366 DOI=10.3389/fphar.2017.00366 ISSN=1663-9812