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Kaplan-Meir comparison of PFS between PBTC-022, stratum E (limited to the 23 patients with OPHG and thalamic tumors; n = 23) to PBTC-029, stratum 4 (all eligible and evaluable patients; n = 25). Abbreviations: OPHG, optic pathway and hypothalamic glioma, PBTC, Pediatric Brain Tumor Consortium, PFS, progression-free survival.
