IL26 and Behcet disease: Interestingly, among significantly serum cytokines upregulated in inactive BD and active BD patients, gp130/sIL-6Rb strongly correlated with sTNF-R2 (r = 0.716, p < 0.001), TWEAK/TNFSF-12 (r = 0.821, p < 0.001), IL-26 (r = 0.773, p = 0.007) serum levels, and sTNF-R1 was to correlate with sTNF-R2 (r = 0.877, p < 0.001), IL-26 (r = 0.773, p = 0.007), and IL-20 (r = 0.709, p = 0.0018) serum levels.