Risk Factors for Aggressive Recurrent Respiratory Papillomatosis in Adults and Juveniles Omland, Turid ; Akre, Harriet ; Lie, Kathrine A. ; Jebsen, Peter ; Sandvik, Leiv ; Brøndbo, Kjell Abstract Publication: PLoS ONE Pub Date: November 2014 DOI: 10.1371/journal.pone.0113584 Bibcode: 2014PLoSO...9k3584O