CCL20 and ulcerative colitis: Compared to HCs [median (Q1, Q3): 2.12 (0, 5.06) pg/mL], serum CCL20 levels were found to be elevated in patients with Crohn’s disease [median (Q1, Q3): 3.78 (2.23, 5.97) pg/mL, p = 0.00041] and ulcerative colitis [median (Q1, Q3): 3.28 (2.45, 5.25) pg/mL, p = 0.0036; Fig. 1B and Supplementary Table 3].