title: Smoking characteristics of methadone patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D006184:Habits; D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D008875:Middle Aged; D012907:Smoking; D019966:Substance-Related Disorders / Q000188:drug therapy*
chemical_list: D008691:Methadone