School Based Sex Education and HIV Prevention in Low- and Middle-Income Countries: A Systematic Review and Meta-Analysis Fonner, Virginia A. ; Armstrong, Kevin S. ; Kennedy, Caitlin E. ; O'Reilly, Kevin R. ; Sweat, Michael D. Abstract Publication: PLoS ONE Pub Date: March 2014 DOI: 10.1371/journal.pone.0089692 Bibcode: 2014PLoSO...989692F