title: Local opioid analgesia at cervical sympathetic Ganglia: what is the contribution of placebo effect?
authors.forename: Basem
authors.initials: B
authors.lastname: Hamid
authors.forename: Richard
authors.initials: R
authors.lastname: Rosenquist
authors.forename: Clinton
authors.initials: C
authors.lastname: Harris
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use; D006801:Humans; D015990:Placebo Effect; D013233:Stellate Ganglion / Q000187:drug effects* / Q000503:physiopathology; D014277:Trigeminal Neuralgia / Q000628:therapy
chemical_list: D000701:Analgesics, Opioid