MKI67 and esophageal squamous cell carcinoma: Ki67/ST2 in ESCC vs. control: 14.50 (10.48–17.72) vs. 9.02 (6.06–12.14), P < 0.05; Ki67/ST2 in stroma vs. control: 18.0 (15.31–21.49) vs. 10.0 (7.64–13.56), P < 0.01.