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A) Kaplan-Meier survival of Hyams Grade. B) Kaplan-Meier survival curve of Kadish-Morita stage. C) Kaplan-Meier survival curve of Dulguerov T-stage. D) Kaplan-Meier survival curve of a modification of the Kadish-Morita staging, which stratifies the Kadish C group into those who present with or without dural infiltration.
