RT Journal Article SR Electronic T1 High burden of prevalent tuberculosis among previously treated people in Southern Africa suggests potential for targeted control interventions JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1227 OP 1230 DO 10.1183/13993003.00716-2016 VO 48 IS 4 A1 Florian M. Marx A1 Sian Floyd A1 Helen Ayles A1 Peter Godfrey-Faussett A1 Nulda Beyers A1 Ted Cohen YR 2016 UL http://erj.ersjournals.com/content/48/4/1227.abstract AB