Figure 1. Histological grading of colitis. (A) Representative photographs showing histological score assigned to biopsies, magnification 10X. (B) Sum of inflammation score according to Dieleman scoring system in normal group, 5-ASA group, HKL group and water group after 3 days, 7 days and 10 days treatment (n = 3 at each time points in each group). * P < 0.05, ** P < 0.01 compared with control group, ## P < 0.01 compared with water group.