Pneumoconiosis and chronic bronchitis.Br Med J 1977; 2 doi: http://dx.doi.org/10.1136/bmj.2.6084.424 (Published 13 August 1977) Cite this as: Br Med J 1977;2:424
- D C Muir,
- J Burns,
- M Jacobsen,
- W H Walton
Data from a major long-term epidemiological survey in the British coalmining industry were examined to determine whether bronchitis offered any protective action against the development of pneumoconiosis. No evidence of such an effect was found.