title: The placebo revisited: what we do, don't and maybe won't know.
authors.forename: Robbert
authors.initials: R
authors.lastname: van Haselen
mesh_terms: D006801:Humans; D015990:Placebo Effect; D010919:Placebos / Q000008:administration & dosage*; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design
chemical_list: D010919:Placebos