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Bärnighausen, Till, Canning, David, Hammitt, James K., Hogan, Dan R., Salomon, Joshua, Salomon, Joshua and Zaslavsky, Alan M. (2012) National HIV Prevalence Estimates for Sub-Saharan Africa: Controlling Selection Bias with Heckman-Type Selection Models. Sexually Transmitted Infections, 88. pp. 17-23.