title: CSF endorphins in chronic opioid-dependent humans.
mesh_terms: D004723:Endorphins / Q000134:cerebrospinal fluid*; D006801:Humans; D008297:Male; D008691:Methadone / Q000627:therapeutic use; D009271:Naltrexone; D009294:Narcotics; D019966:Substance-Related Disorders / Q000134:cerebrospinal fluid* / Q000534:rehabilitation
chemical_list: D004723:Endorphins; D009294:Narcotics; D009271:Naltrexone; D008691:Methadone