EGFR and neoplasm: When using 36.3% as the optimal cut-off point for EGFR(+), 11/12 (91.7%) cases of EGFR mutation-positive tumor samples showed positive for the ratio of EGFR(+), and 9/11 (81.8 %) cases of these EGFR mutation-negative tumor tissues were negative for the ratio of EGFR(+) (Supplementary Fig. 24).