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Heat map of HPV prevalence by oropharyngeal cancer sub-site. (A) Prevalence of HPV, defined by each included study, stratified by tonsillar (TSCC) and base of tongue (BOTSCC) squamous cell carcinomas vs. “other” (i.e. walls of oropharynx, uvulae and soft palate) oropharyngeal squamous cell carcinomas (OPSCC). (B) Prevalence of HPV, defined by each included study, stratified by TSCC only vs. “other” OPSCC.
