title: A 2.5 year follow-up of abstinence and relapse to cocaine abuse in opioid addicts.
mesh_terms: D000328:Adult; D003042:Cocaine; D004812:Epidemiologic Methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009293:Opioid-Related Disorders / Q000150:complications*; D019966:Substance-Related Disorders / Q000150:complications*
chemical_list: D003042:Cocaine