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Overall survival (OS) for recurrent glioblastoma patients (n = 40) who were bevacizumab naïve (n = 14) and those who had failed bevacizumab (n = 26). Median OS for bevacizumab-failed was 18.2 weeks (95% CI, 13.9–27.3 weeks); median OS for bevacizumab-naïve was 62 weeks (95% CI, 26.1 weeks to not reached). P =.001.
