CALR and synovial sarcoma: In multivariate analysis adjusting for age, gender and ethnicity, we observed a strong positive association between positive RF (OR = 5.03, 95%CI: 1.78–14.21), ANA (OR = 14.75, 95%CI: 4.09–53.17) or a combination of anti-SSA/B (OR = 20.97, 95%CI: 4.60–95.54) autoantibodies in SS compared to DES patients (Table 2).