Ventilation studies on a normal population after a seven-year interval.
D000328:Adult; D000368:Aged; D000375:Aging; D001827:Body Height; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D012119:Respiration; D013147:Spirometry; D014922:Wisconsin