ABCC1 and endometrial cancer: In this study, we have focused on endometrial cancer due to the abundance of mutation data, which were relatively higher than those of other cancer types, as shown in Figure 1, Figure 2, and Figure 3 for ABCG2, ABCB1, and ABCC1, respectively, taken from cBioPortal for cancer genomics (Gao et al., 2013).