“…However, the available preliminary evidence suggests that rechallenge with osimertinib may induce tumor responses after intervening lines of therapy, suggesting that an arm of EGFR TKI alone may be justified. [12][13][14][15] In these circumstances, consideration may be given to a four-arm randomized factorial trial design, which includes an EGFR TKI-alone arm, a novel therapy-alone arm, a combination regimen arm, and a control arm.…”