Fig. 4From: Clinical utility of liquid biopsy for EGFR driver, T790M mutation and EGFR amplification in plasma in patients with acquired resistance to afatiniba EGFR wild-type copy number variation (CNV) in plasma for EGFR amplification testing. b Representative ddPCR data for EGFR CNV in patients with EGFR copy loss, diploid and amplificationBack to article page