Expression of AXL and CDCP1 in tumor samples was examined by immunohistochemical (IHC) analysis after tumors were surgically resected in 6 patients (#1, #2 with wild-type EGFR; #3, #4 with EGFRdel19; #5, #6 with L858R EGFR) before chemotherapy (Fig. 6a). Here, AXL is linked to neoplasm.