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a The actuarial 5-year Kaplan–Meier curves for overall survival in postoperative oral cavity cancer patients treated with radiotherapy with a package of overall treatment time (POTT) less than 13 weeks or more than 13 weeks; b The actuarial 5-year -year Kaplan–Meier estimates of local progression-free survival in postoperative oral cavity cancer patients treated with radiotherapy with an overall treatment time of radiation therapy (OTTRT) less than 8 weeks or longer than 8 weeks
