PTPA and esophageal squamous cell carcinoma: To determine if PP2A is involved in ESCC progression, we analyzed Kaplan-Meier Plotter datasets (http://kmplot.com, accessed date: 8 November 2019) and found that the expression level of PPP2CA, the major catalytic subunit of PP2A, was negatively correlated with the overall survival rate of esophageal cancer (Supplementary Figure S1A,B).