An epidemiological study of rheumatoid arthritis associated with characteristic chest x-ray appearances in coal-workers.
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000150:complications*; D003031:Coal; D016021:Epidemiologic Studies; D006801:Humans; D008171:Lung Diseases; D014965:X-Rays
D003031:Coal
ARTHRITIS, RHEUMATOID/complications; LUNGS/diseases