Tuberculosis as a world problem: the current epidemiological position.
D003906:Developing Countries; D004812:Epidemiologic Methods; D006801:Humans; D008400:Mass Chest X-Ray; D014374:Tuberculin Test; D014376:Tuberculosis / Q000175:diagnosis / Q000453:epidemiology* / Q000401:mortality; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology