There are errors in the Funding section that were not corrected during the typesetting process. The correct funding information is as follows: This work was supported by the Sall Family Foundation via the Pan American Health and Education Foundation (renamed PAHO Foundation) and EUROHEALTH. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. URL: http://www.pahofoundation.org.The publisher apologizes for these errors.
Authors: Joëlle Castellani; Borislava Mihaylova; Silvia M A A Evers; Aggie T G Paulus; Zakayo E Mrango; Omari Kimbute; Joseph P Shishira; Francis Mulokozi; Max Petzold; Jan Singlovic; Melba Gomes Journal: PLoS One Date: 2015-04-10 Impact factor: 3.240