NOTE. P < .00357 represents statistical significance after the Bonferroni correction. Abbreviations: MAPK, mitogen-activated protein kinase; NA, unable to be calculated; NR, not reached; OS, overall ...
As there were no previous pediatric data, ulixertinib was initially tested in a dose escalation cohort to establish the recommended phase II dose (RP2D) before proceeding to the phase II cohort.