Rated effectiveness of antidrug letters by drug users and nonusers.
D000661:Amphetamine; D001294:Attitude to Health; D002188:Cannabis; D005260:Female; D006266:Health Education; D006801:Humans; D008238:Lysergic Acid Diethylamide; D008297:Male; D010565:Persuasive Communication; D019966:Substance-Related Disorders / Q000517:prevention & control*; D014956:Writing
D008238:Lysergic Acid Diethylamide; D000661:Amphetamine