The relation between FEV-O.75 and FEV-1 in two employed populations.
D000397:Air Pollution; D003032:Coal Mining; D005260:Female; D006801:Humans; D008297:Male; D009787:Occupational Medicine; D011009:Pneumoconiosis / Q000175:diagnosis; D011159:Population Surveillance; D013147:Spirometry; D006113:United Kingdom