title: Updating the assignment of levels of evidence.
authors.affiliation: Associate Editor for Evidence-Based Orthopaedics.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Marx
authors.forename: Sean M
authors.initials: SM
authors.lastname: Wilson
authors.affiliation: Editor-in-Chief.
authors.forename: Marc F
authors.initials: MF
authors.lastname: Swiontkowski
mesh_terms: D015706:Bibliometrics; D035843:Biomedical Research / Q000592:standards; D002986:Clinical Trials as Topic / Q000592:standards*; D019317:Evidence-Based Medicine; D011643:Publishing / Q000592:standards; D012107:Research Design