RT Journal Article SR Electronic T1 CORRIGENDUM JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 254 OP 254 DO 10.1136/ard.13.3.254 VO 13 IS 3 YR 1954 UL http://ard.bmj.com/content/13/3/254.abstract AB