Unsuccessful pain relief: the relatives' perspective.
D017028:Caregivers; D003142:Communication; D006306:Health Surveys; D006801:Humans; D009369:Neoplasms / Q000503:physiopathology* / Q000523:psychology; D010146:Pain / Q000209:etiology*; D059408:Pain Management; D017060:Patient Satisfaction; D010817:Physician-Patient Relations; D013727:Terminal Care