Changing attitudes toward smoking.
D000329:Advertising; D001294:Attitude to Health; D001991:Bronchitis / Q000209:etiology; D002318:Cardiovascular Diseases / Q000209:etiology; D006306:Health Surveys; D007878:Legislation as Topic; D008175:Lung Neoplasms / Q000209:etiology; D011656:Pulmonary Emphysema / Q000209:etiology; D012907:Smoking; D014481:United States