Complex Etiology Underlies Risk and Survival in Head and Neck Cancer Human Papillomavirus, Tobacco, and Alcohol: A Case for Multifactor Disease : Figure 2

Figure 2: (a) Oral cavity recurrence-free specific Kaplan-Meier survival curves by E6/E7 and tumor DNA status. (b) Oropharynx recurrence-free specific Kaplan-Meier survival curves by E6/E7 and tumor DNA status.