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Kaplan–Meier curve of overall survival (OS) in the 100 OPSCC cases. a Kaplan–Meier curve of OS in all OPSCC cases. b Kaplan–Meier curve of OS according to stages determined by the 7th edition of the AJCC staging manual. c Kaplan–Meier curve of OS according to stages determined by the 8th edition of the AJCC staging manual. d Kaplan–Meier curve of OS in p16-positive and p-16 negative cases
