Fig. 1From: Prevalence of human papillomavirus types and variants and p16INK4a expression in head and neck squamous cells carcinomas in São Paulo, BrazilOverall HPV DNA prevalence by anatomical subsite and sample origin. Prevalence (%) and 95 % CI are indicated. FCMSCSP-Santa Casa de Sao Paulo, School of Medicine; ICESP-Cancer Institute of São PauloBack to article page