SSB and Sjogren syndrome: The serum concentrations of PFNA (2.2 (1.3, 3.7) ng/mL vs. 1.8 (1.4, 2.8) ng/mL; p = 0.2863), PFDA (2.0 (1.0, 3.2) ng/mL vs. 1.5 (1.0, 2.3) ng/mL; p = 0.1511), PFUdA (1.3 (0.8, 2.3) ng/mL vs. 1.2 (0.8, 1.6) ng/mL; p = 0.1423) and PFHxS (2.1 (1.1, 3.8) ng/mL vs. 1.7 (0.9, 3.9) ng/mL; p = 0.3741) were found to be higher in Sjogren’s syndrome patients who were anti-SSB-negative than in those who were anti-SSB-positive, but the differences for all of them did not reach statistical significance.