The distortion effect in student perceptions of smoking prevalence.
D000293:Adolescent; D000367:Age Factors; D001294:Attitude to Health; D002140:California; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006266:Health Education; D006801:Humans; D008297:Male; D009820:Ohio; D010379:Peer Group; D012907:Smoking; D013334:Students / Q000523:psychology*; D014589:Utah