Kaplan‐Meier survival analysis of CUL4B performed using an online database (http://kmplot.com/analysis/) revealed that increased expression of CUL4B, HIF1α, Snail, and ZEB2 were significantly positively associated with a poor overall survival rate in patients with breast cancer (Figure S8B, left and middle panels, Supporting Information 1). Here, SNAI1 is linked to breast cancer.