3Mavragani CP, Moutsopoulos HM. The geoepidemiology of sjtigren' s syndrome [ J ]. Autoimmun Rev, 2010, 9 ( 5 ) : A305- 310.
4Pillemer SR, Matteson EL, Jacobsson LT, et al. Incidence of physician-diagnosed primary Sjfigren syndrome in residents of Olmsted County, Minnesota[J]. Mayo Clin Proc, 2001,76(6) :593-599.
5Vitali C, Bombardieri S, Jonsson R, et al. Classification criteria for Sjogren' s syndrome : a revised version of the European criteria proposed by the American-European Consensus Group [ J ]. Ann Rheum Dis, 2002, 61 (6) : 554-558.