title: Defining radiographic incidence and progression of knee osteoarthritis: suggested modifications of the Kellgren and Lawrence scale.
authors: Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, 715 Albany Street, A203, Boston, MA 02118, USA. dfelson@bu.edu
authors: David T
authors: DT
authors: Felson
authors: Jingbo
authors: J
authors: Niu
authors: Ali
authors: A
authors: Guermazi
authors: Burton
authors: B
authors: Sack
authors: Piran
authors: P
authors: Aliabadi
mesh_terms: D018450:Disease Progression; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000473:pathology; D020370:Osteoarthritis, Knee / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D054850:Osteophyte / Q000000981:diagnostic imaging / Q000209:etiology; D011859:Radiography; D012720:Severity of Illness Index