Figure 1. HPV and its genotypes distribution in the study. HPV: Human papillomavirus; HNC: head and neck cancer. All samples were negative for HPV6, HPV11, HPV18, HPV26, HPV31, HPV33, HPV35, HPV39, HPV45, HPV51, HPV52, HPV53, HPV56, HPV59, HPV66, HPV68, HPV70 and HPV73.