title: Fundamental problem with opioid trials for chronic pain.
authors: Tushar
authors: T
authors: Mehta
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D002908:Chronic Disease; D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D010147:Pain Measurement; D016896:Treatment Outcome
chemical_list: D000701:Analgesics, Opioid