title: Are validated questionnaires valid?
authors.forename: Frederick A
authors.initials: FA
authors.lastname: Matsen
authors.forename: Edward V
authors.initials: EV
authors.lastname: Fehringer
mesh_terms: D017063:Outcome Assessment, Health Care; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*