Fig. 1

Prevalence of EBV infection in nasal polyps (NP), sinonasal inverted papillomas (SIP), and sinonasal squamous cell carcinomas (SNSCC) according to results of SYBR green real-time PCR. a-c melting curves of GAPDH, BALF5, and BZLF1, respectively, of positive-, negative-control, and tested samples. d EBV prevalence in the tested population