title: Levels of evidence.
authors.forename: M H A
authors.initials: MH
authors.lastname: Malik
authors.forename: A
authors.initials: A
authors.lastname: Gambhir
authors.forename: M L
authors.initials: ML
authors.lastname: Porter
mesh_terms: D019317:Evidence-Based Medicine / Q000592:standards*; D006801:Humans; D019637:Orthopedic Procedures / Q000592:standards*; D016032:Randomized Controlled Trials as Topic