RT Journal Article SR Electronic T1 The distinct pathogenesis of IgG4 Mickulicz's disease and Sjogren's syndrome in Japan; the role of IL-21 and IL-6 JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1919 OP 1920 DO 10.1136/annrheumdis-2012-201866 VO 71 IS 12 A1 Robert Irving Fox YR 2012 UL http://ard.bmj.com/content/71/12/1919.abstract AB