AGR2 and esophageal squamous cell carcinoma: Among the 14 associated genes, the AGR2, CXCL17 and MUC20 in the Mucosal program were also significantly associated with survival time in a validation cohort of 94 ESCC patients (Validation cohort 1; all Plog-rank < 0.05; Supplementary Fig. 7a, b; Supplementary Data 1c and 8).