Breast cancer samples from the TCGA (11.16113188) and GSE20685 (8.09563334299417) datasets were stratified into high (HPG) and low expression groups (LPG) based on the median expression values of the PDP1. Survival analysis of these two cohorts indicated that breast cancer samples with high expression of PDP1 had poorer overall survival compared to those with low expression (Figures 1F, G). This evidence concerns the gene PDP1 and breast cancer.