Figure 1

Flow chart study. pSS: primary Sjögren’s syndrome according to AECG, sSS: secondary Sjögren’s syndrome according to AECG, 8 SLE: Systemic Lupus Erythematosus, 6 RA: Rheumatoid Arthritis, 3 Overlap (SSc: Systemic Sclerosis, APS: Antiphospholid Syndrome, SS: Sjögren’s syndrome).