RT Journal Article SR Electronic T1 Response to: ‘Is primary Sjögren's syndrome an orphan disease? A critical appraisal of prevalence studies in Europe’ by Cornec and Chiche JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e26 OP e26 DO 10.1136/annrheumdis-2014-206885 VO 74 IS 3 A1 Baodong Qin A1 Jiaqi Wang A1 Zaixing Yang A1 Yan Liang A1 Renqiang Zhong YR 2015 UL http://ard.bmj.com/content/74/3/e26.abstract AB