title: Opium smoking in Laos: a survey of 40 addicts.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D003417:Criminal Psychology; D003431:Cross-Cultural Comparison; D004196:Disease Outbreaks; D005006:Ethnicity; D005191:Family Characteristics; D005260:Female; D006306:Health Surveys; D006801:Humans; D007812:Laos; D008297:Male; D008875:Middle Aged; D009892:Opium; D012008:Recurrence; D012424:Rural Population; D012737:Sex Factors; D012923:Social Class; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D014481:United States
chemical_list: D009892:Opium