RT Journal Article SR Electronic T1 Corrections JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1520 OP 1520 DO 10.1136/annrheumdis-2011-80-09 VO 70 IS 8 YR 2011 UL http://ard.bmj.com/content/70/8/1520.2.abstract AB