Fig. 2
HPV-16 RNA in oral rinse associates with tumor p16INK4a status. a Detection of HPV-16 RNA in representative oral rinse samples of patients with p16INK4a-positive and-negative tumors using RT-PCR. (b) The analysis of HPV-16 RNA copy number in oral rinse of patients with p16INK4a-positive tumors using quantitative RT-PCR. (ND = Not detected). No HPV-16 RNA was detected in oral rinse of patients with p16-negative tumors