Credibility of sources of information about drugs to heroin addicts.
D000328:Adult; D001741:Black or African American; D000488:Allied Health Personnel; D001364:Awareness; D003071:Cognition; D003376:Counseling; D005260:Female; D006266:Health Education; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D008297:Male