The health of underground workers in a Ruhr coal-mine.
D000293:Adolescent; D000328:Adult; D003031:Coal; D005860:Germany, West; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D008906:Mining; D009784:Occupational Diseases; D011009:Pneumoconiosis / Q000175:diagnosis*; D014397:Tuberculosis, Pulmonary
D003031:Coal