How do we classify rheumatoid arthritis in established disease--can we apply the 2010 American College of Rheumatology/European League Against Rheumatism classification criteria?

J Rheumatol. 2014 Dec;41(12):2347-51. doi: 10.3899/jrheum.141443.

¹ Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Institute of Inflammation and Repair, University of Manchester, Manchester Academic Health Science Centre, UK.
² Epidemiology Unit, Italian Society for Rheumatology, Milan, Italy.
³ National Resource Center for Rehabilitation in Rheumatology, Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway.
⁴ Université Pierre et Marie Curie, Faculté de Médecine, Department of Rheumatology, APHP, Hôpital Pitié Salpétrière, Paris, France.
⁵ Department of Rheumatology, Jyväskylä Central Hospital, Jyväskylä, Finland.
⁶ Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Institute of Inflammation and Repair, University of Manchester, Manchester Academic Health Science Centre, UK; and the UK National Institute for Health Research Manchester Musculoskeletal Biomedical Research Unit, Central Manchester University Hospitals National Health Service Foundation Trust, and the University of Manchester partnership. [email protected].

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