PMEPA1 and esophageal squamous cell carcinoma: By using the bioinformatics analysis, high expression of miR-877-3p predicted better overall survival of patients with ESCC (Supplementary Figure 2B); while the expression levels between linc00941 and PMEPA1 were not significantly correlated with the overall survival of patients with ESCC (Supplementary Figure 2A, 2C), which may be caused by the small sample size in the database.