Fig. 3From: Differential significance of molecular subtypes which were classified into EGFR exon 19 deletion on the first line afatinib monotherapySwimmer plots of Progression-free survival according to different exon 19 deletion molecular variants (n = 26). Arrows on the right end of the bars indicate ongoing response. Quadrangles on each bar represent plasma cfDNA collection. Black-fill and blank represent positive and negative for plasma cfDNA (exon 19 deletion)Back to article page