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OS is significantly greater in the re-irradiation group (n = 6) than in the one-time irradiation group (n = 19; p = 0.02). Significant differences were observed in the OS time between one-time (initial irradiation only) patients (n = 19) and re-irradiation (n = 6); log-rank test (p = 0.02). OS, overall survival.
