Lung mechanics in relation to radiographic category of coalworkers' simple pneumoconiosis.
D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography; D012129:Respiratory Function Tests