Fig. 1From: Differential significance of molecular subtypes which were classified into EGFR exon 19 deletion on the first line afatinib monotherapyConsort diagram. Three patients who had exon 19 deletion were excluded (Rapid progression after enrollment (n = 1), Patients’ tumor DNA were unavailable (n = 2)). Del19: exon 19 deletion; L858R: exon 21 Leu858ArgBack to article page