KRAS and gastric cancer: Cell lines were selected from the NCI60 tumor cell line collection among those most frequently harboring KRAS mutations: 11 CRC cell lines (six harboring mut-KRAS), 9 lung cancer cell lines (four harboring mut-KRAS), 2 mut- and 1 wt-KRAS pancreatic cancers, 1 mut- and 2 wt-KRAS ovarian cancers and 1 mut- and 1 wt-KRAS stomach cancers [111].