RT Journal Article SR Electronic T1 Clinical applicability of the EULAR Sjögren's syndrome disease activity index: a cumulative ESSDAI score adds in describing disease severity JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 631 OP 631 DO 10.1136/annrheumdis-2011-200766 VO 71 IS 4 A1 Anna P Risselada A1 Aike A Kruize A1 Johannes W J Bijlsma YR 2012 UL http://ard.bmj.com/content/71/4/631.abstract AB