title: [Only placebo?].
authors.forename: Eija
authors.initials: E
authors.lastname: Kalso
mesh_terms: D000698:Analgesia / Q000379:methods / Q000523:psychology; D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism*; D003071:Cognition / Q000502:physiology*; D006801:Humans; D018847:Opioid Peptides / Q000378:metabolism*; D010147:Pain Measurement; D015990:Placebo Effect; D014055:Tomography, Emission-Computed
chemical_list: D018847:Opioid Peptides