CALR and xerostomia: The diagnosis of primary Sjögren’s syndrome is established by fulfilling the criteria set by the American–European Consensus Group (AECG), which includes the clinical features of xerophthalmia and xerostomia along with the presence of anti-Sjögren’s syndrome-related antigen A autoantibodies (anti-SSA/Ro and/or anti-SSB/La antibodies) [17].