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Continue to ChatA trial-level correlation analysis of progression-free survival as a surrogate for overall survival in the immunotherapy era. - https://avesis.ankara.edu.tr/yayin/a05261cf-442f-4f0c-b93a-5d6318299078/a-trial-level-correlation-analysis-of-progression-free-survival-as-a-surrogate-for-overall-survival-in-the-immunotherapy-era