title: How frequent is latent tuberculosis infection in China?
authors: TB Competence Center, Swiss Lung Association, Berne 3007, Switzerland. Electronic address: zellwegerjp@swissonline.ch.
authors: Jean-Pierre
authors: JP
authors: Zellweger
mesh_terms: D005260:Female; D006801:Humans; D055985:Latent Tuberculosis / Q000453:epidemiology*; D008297:Male