KRAS and cancer: First, we evaluated cetuximab sensitivity in eight KRAS WT CRC cell lines (C2BBE1, CAR-1, COLO-320-HSR, SW48, DiFi, NCI-H716, SNU-C1, and HT29) from the Genomics of Drug Sensitivity in Cancer (GDSC) database (Table EV1, https://www.cancerrxgene.org/).