title: Response-shift bias: a challenge to the assessment of patients' quality of life in cancer clinical trials.
authors.affiliation: Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
authors.forename: M A
authors.initials: MA
authors.lastname: Sprangers
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D009369:Neoplasms / Q000523:psychology* / Q000628:therapy; D011788:Quality of Life