The emerging threat of drug-resistant tuberculosis in southern Africa [electronic resource] : global and local challenges and solution : summary of a joint workshop / by the Institute of Medicine and the Academy of Science of South Africa ; Steve Olson, Yeonwoo Lebovitz, and Anne Claiborne, rapporteurs; Forum on Drug Discovery, Development, and Translation, Board of Medicine, Institute of Medicine of the National Academies, and Academy of Science of South Africa.