title: How should we interrogate the ClinicalTrials.gov database?
authors.forename: Steve N
authors.initials: SN
authors.lastname: Quessy
mesh_terms: D000700:Analgesics / Q000627:therapeutic use*; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D016032:Randomized Controlled Trials as Topic; D012042:Registries; D012107:Research Design
chemical_list: D000700:Analgesics