title: Are validated questionnaires valid?
authors.forename: Allen F
authors.initials: AF
authors.lastname: Anderson
authors.forename: James J
authors.initials: JJ
authors.lastname: Irrgang
mesh_terms: D017063:Outcome Assessment, Health Care; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*