EGFR and neoplasm: Nine PDECX models were selected to evaluate in vivo anti-tumor activity of theliatinib, including 7 with high EGFR expression (H score > 200), 2 (PDECX 1T0326 and PDECX 1T0950) with simultaneous EGFR gene amplification and high EGFR protein expression, 1 with medium EGFR expression (PDECX 1T0474, H score = 180) and 1 with low EGFR expression (PDECX 1T0773, H score = 15).