Samples from 37 patients with CRC who had received cetuximab therapy were analyzed for EGFR localization, and the EGFR trafficking status is summarized in Table S1 (Supporting Information); 24 of 37 (64.8%) patients showed EGFR internalization, whereas 13 of 37 (35.2%) showed EGFR membrane localization. Here, EGFR is linked to colorectal carcinoma.