title: All levels of evidence contribute to our evolving knowledge.
authors.affiliation: The Bone & Joint Journal, 22 Buckingham Street, London, WC2N 6ET, and NIHR University College London Hospitals Biomedical Research Centre, UK.
authors.forename: F S
authors.initials: FS
authors.lastname: Haddad
mesh_terms: D019317:Evidence-Based Medicine / Q000379:methods*; D006801:Humans; D019359:Knowledge; D019637:Orthopedic Procedures