title: The role of placebo response in clinical headache evaluations.
mesh_terms: D000700:Analgesics; D018712:Analgesics, Non-Narcotic / Q000628:therapy*; D058633:Antipyretics; D006261:Headache / Q000628:therapy*; D010919:Placebos / Q000628:therapy*
chemical_list: D000700:Analgesics; D018712:Analgesics, Non-Narcotic; D058633:Antipyretics; D010919:Placebos
keywords: ANALGESICS AND ANTIPYRETICS/therapy; HEADACHE/therapy; PLACEBOS/therapy