PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/ard.2009.119966corr1 DP - 2011 Feb 01 TA - Annals of the Rheumatic Diseases PG - 397--397 VI - 70 IP - 2 4099 - http://ard.bmj.com/content/70/2/397.2.short 4100 - http://ard.bmj.com/content/70/2/397.2.full SO - Ann Rheum Dis2011 Feb 01; 70