title: Drug use in dependent opioid users.
authors.forename: N
authors.initials: N
authors.lastname: Chamberlain
mesh_terms: D000107:Acetylation; D003932:Heroin / Q000138:chemical synthesis; D006801:Humans; D009020:Morphine / Q000737:chemistry; D009293:Opioid-Related Disorders
chemical_list: D003932:Heroin; D009020:Morphine