AUTHOR=Vojvodic Katarina , Terzic-Supic Zorica , Santric-Milicevic Milena , Wolf Gert W. TITLE=Socio-Economic Inequalities, Out-of-Pocket Payment and Consumers' Satisfaction with Primary Health Care: Data from the National Adult Consumers' Satisfaction Survey in Serbia 2009–2015 JOURNAL=Frontiers in Pharmacology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2017.00147 DOI=10.3389/fphar.2017.00147 ISSN=1663-9812