title: Critical appraisal. 4. Questioning evidence: its validity and importance.
authors.affiliation: Department of Health Studies, University of York.
authors.forename: C
authors.initials: C
authors.lastname: Thompson
mesh_terms: D015982:Bias; D019317:Evidence-Based Medicine; D006801:Humans; D015399:Nursing Research / Q000592:standards*; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards*