The epidemiology of emphysema.
D000354:Africa, Western; D000367:Age Factors; D000368:Aged; D001208:Asia; D001315:Australia; D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009549:Nigeria; D009656:North America; D011656:Pulmonary Emphysema / Q000453:epidemiology* / Q000209:etiology; D012306:Risk; D012737:Sex Factors