Ventilatory function in males in a Witwatersrand town. Comparison between smokers and nonsmokers.
D000328:Adult; D000367:Age Factors; D000531:Altitude; D001827:Body Height; D001835:Body Weight; D001991:Bronchitis / Q000503:physiopathology; D002908:Chronic Disease; D005163:Factor Analysis, Statistical; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D008906:Mining; D012119:Respiration; D012494:Sampling Studies; D012907:Smoking; D013147:Spirometry