%0 Journal Article %T Abolishing User Fees in Africa %A Val¨Śry Ridde %A Slim Haddad %J PLOS Medicine %D 2009 %I Public Library of Science (PLoS) %R 10.1371/journal.pmed.1000008 %U http://www.plosmedicine.org/article/info%3Adoi%2F10.1371%2Fjournal.pmed.1000008