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Survival analysis for FGFR1 protein expression in patients with HPV in situ hybridization negativity. FGFR1 is a poor prognostic factor for recurrence (p=0.031, log-rank, B), while no prognostic significance is observed in overall survival (p=0.076, log-rank, A). Abbreviations: FGFR1, fibroblast growth factor receptor 1; HPV, human papillomavirus.
