The prevention of emphysema.
D000328:Adult; D000397:Air Pollution / Q000517:prevention & control; D001991:Bronchitis / Q000517:prevention & control; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011009:Pneumoconiosis / Q000517:prevention & control; D011656:Pulmonary Emphysema / Q000517:prevention & control*; D000074606:Smoking Prevention; D013147:Spirometry; D014481:United States