title: The levels of evidence and their role in evidence-based medicine.
authors.affiliation: Ann Arbor, Mich.; and Dallas, Texas From the Section of Plastic Surgery, Department of Surgery, University of Michigan Health System, and the Department of Plastic Surgery, University of Texas Southwestern Medical Center.
authors.forename: Patricia B
authors.initials: PB
authors.lastname: Burns
authors.forename: Rod J
authors.initials: RJ
authors.lastname: Rohrich
authors.forename: Kevin C
authors.initials: KC
authors.lastname: Chung
mesh_terms: D019317:Evidence-Based Medicine / Q000145:classification* / Q000379:methods*; D013518:Surgery, Plastic / Q000592:standards