title: Incidence of hepatitis-associated antigen among patients in a methadone clinic.
mesh_terms: D000328:Adult; D005260:Female; D006506:Hepatitis A / Q000150:complications / Q000276:immunology; D006511:Hepatitis B Antigens; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use*; D008875:Middle Aged; D019966:Substance-Related Disorders / Q000150:complications / Q000188:drug therapy
chemical_list: D006511:Hepatitis B Antigens; D008691:Methadone