TY - JOUR T1 - Corrigendum JF - Annals of the Rheumatic Diseases JO - Ann Rheum Dis SP - 150 LP - 150 DO - 10.1136/ard.12.2.150 VL - 12 IS - 2 A2 - , Y1 - 1953/06/01 UR - http://ard.bmj.com/content/12/2/150.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -