title: Lung function and clnical findings in cross sectional and longitudinal studies in coal workers from the ruhr area.
mesh_terms: D000328:Adult; D003032:Coal Mining; D005860:Germany, West; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000175:diagnosis / Q000503:physiopathology*; D012129:Respiratory Function Tests