Fig. 3From: HPV-16 infection modifies overall survival of Puerto Rican HNSCC patientsOverall survival of HNSCC patients according to HPV-16 status and tumor staging. Kaplan-Meier survival curve analysis of HNSCC HPV-16 positive patients versus HPV-16 negative patients distributed by tumor staging. a Early Stages (I and II); b Late Stages (III and IV)Back to article page