title: Voluntary treatment for drug abuse in Hong Kong.
mesh_terms: D000328:Adult; D001462:Barbital; D003365:Costs and Cost Analysis; D005260:Female; D006556:Heroin Dependence / Q000453:epidemiology; D006723:Hong Kong; D006801:Humans; D008297:Male; D008605:Mental Health Services; D008722:Methods; D009021:Morphine Dependence / Q000453:epidemiology; D009892:Opium; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000534:rehabilitation*
chemical_list: D001462:Barbital; D009892:Opium