Furthermore, Kaplan-Meier analysis in 140 primary breast cancer tissues from cohort 1 demonstrated that patients with lower ARID1A expression showed a worse outcome (Supplementary Figure S3A), which was reconfirmed by online Kaplan–Meier-Plotter database-analyzed overall survival plot of breast cancer (Supplementary Figure S3B) (Gyorffy et al., 2010). Here, ARID1A is linked to breast cancer.