title: Systematic review is the highest level of evidence for knee osteoarthritis injection options, not expert society guidelines.
authors.forename: John W
authors.initials: JW
authors.lastname: Orchard
mesh_terms: D006801:Humans; D007270:Injections, Intra-Articular; D007719:Knee Joint; D020370:Osteoarthritis, Knee; D053657:Platelet-Rich Plasma
keywords: Corticosteroids; Knee surgery; Platelet-rich plasma