| recurrent respiratory papillomatosis: hpv genotypes and risk of high-grade laryngeal neoplasia. | patients with recurrent respiratory papillomatosis (rrp) in norway treated between 1987 and 2009 were recruited to this cohort study. they were followed from disease onset and data recorded until january 2012. here, we describe the distribution of human papillomavirus (hpv) genotypes, the prevalence of multiple hpv infections, and the risk of high-grade laryngeal neoplasia and respiratory tract invasive carcinoma in a large cohort of patients with rrp. we also examined whether hpv genotype, gend ... | 2014 | 24918765 |