Evidence for scaling up HIV treatment in sub-Saharan Africa: A call for incorporating health system constraints. oleh Evelinn Mikkelsen, Jan A C Hontelez, Maarten P M Jansen, Till Bärnighausen, Katharina Hauck, Kjell A Johansson, Gesine Meyer-Rath, Mead Over, Sake J de Vlas, Gert J van der Wilt, Noor Tromp, Leon Bijlmakers, Rob M P M Baltussen