title: Attacks and relapses of sputum-smear-positive tuberculosis over seven years at three Transkei hospitals.
authors: D H
authors: DH
authors: Shennan
authors: H
authors: H
authors: Maarsingh
authors: B
authors: B
authors: Davenport
mesh_terms: D000328:Adult; D000350:Africa, Central; D006801:Humans; D009161:Mycobacterium / Q000302:isolation & purification; D012008:Recurrence; D012189:Retrospective Studies; D013183:Sputum / Q000382:microbiology*; D013997:Time Factors; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology*