EGFR and non-small cell lung carcinoma: In a clone formation assay using the H1975 and H3255 cell lines (double‐mutant [L858R plus T790M] and single‐mutant [L858R] for EGFR, respectively), Li et al. found that the SF2 value for H1975 and H3255 was 0.62 and 0.64, respectively, suggesting that the T790M mutation does not affect the radiosensitivity of NSCLC cell lines.