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Kaplan–Meier curves for disease-free survival (DFS) using RRSHPV+ in training ST (A), internal validation SV (B), external validation SCCF (C), and the combined validation set SV+SCCF (D). Kaplan–Meier curves for DFS prediction using RRSHPV− in ST (E) and SV (F). DFS prediction for HPV+ patients in the ST (G) and SV+SCCF set (H) using radiomic nomogram (Mp+RRS), which contains pathologic tumor stage and the RRSHPV+.
