1.de Villiers, EM, et al. Classification of papillomaviruses. Virology 2004; 324: 17–27.
2.Bernard, H et al. Classification of papillomaviruses (PVs) based on 189 PV types and proposal of taxonomic amendments. Virology 2010; 401: 70–79.
3.Howley, PM, Lowy, DR. Papillomaviruses. In: Knipe, DM, Howley, PM, eds. Fields Virology, 5th edn. Philadelphia: Lippincott, Williams, Wilkins, 2007, pp. 2299–2354.
4.Rabah, R, et al. Human papillomavirus-11-associated recurrent respiratory papillomatosis is more aggressive than human papillomavirus-6-associated disease. Pediatric and Developmental Pathology 2001; 4: 68–72.
5.Wiatrak, BJ, et al. Recurrent respiratory papillomatosis: a longitudinal study comparing severity associated with human papilloma viral types 6 and 11 and other risk factors in a large pediatric population. The Laryngoscope 2004; 114: 1–23.
6.Seedat, RY, et al. HPV types causing juvenile recurrent laryngeal papillomatosis in South Africa. International Journal of Pediatric Otorhinolaryngology 2010; 74: 255–259.
7.Heinzel, PA, et al. Variation of human papillomavirus type 6 (HPV-6) and HPV-11 genomes sampled throughout the world. Journal of Clinical Microbiology 1995; 33: 1746–1754.
8.Maver, PJ, et al. Prevaccination genomic diversity of human papillomavirus genotype 11: a study on 63 clinical isolates and 10 full-length genome sequences. Journal of Medical Virology 2011; 83: 461–470.
9.Kocjan, BJ, et al. Prevaccination genomic diversity of human papillomavirus genotype 6 (HPV 6). Virology 2009; 391: 274–283.
10.Lace, MJ, et al. Upstream regulatory region alterations found in human papillomavirus type 16 (HPV-16) isolates from cervical carcinomas increase transcription, ori function, and HPV immortalization capacity in culture. Journal of Virology 2009; 83: 7457–7466.
11.Chin, MT, Broker, TR, Chow, LT. Identification of a novel constitutive enhancer element and an associated binding protein: implications for human papillomavirus type 11 enhancer regulation. Journal of Virology 1989; 63: 2967–2976.
12.Rübben, A, et al. Rearrangements of the upstream regulatory region of human papillomavirus type 6 can be found in both Buschke-Lowenstein tumours and in condylomata acuminate. Journal of General Virology 1992; 73: 3147–3153.
13.Derkay, CS, et al. A staging system for assessing severity of disease and response to therapy in recurrent respiratory papillomatosis. The Laryngoscope 1998; 108: 935–937.
14.Hester, RP, et al. Reliability of a staging assessment system for recurrent respiratory papillomatosis. International Journal of Pediatric Otorhinolaryngology 2003; 67: 505–9.
15.Chan, SY, et al. Analysis of genomic sequences of 95 papillomavirus types: uniting typing, phylogeny, and taxonomy. Journal of Virology 1995; 69: 3074–3083.
16.DiLorenzo, TP, et al. Human papillomavirus type 6a DNA in the lung carcinoma of a patient with recurrent laryngeal papillomatosis is characterized by a partial duplication. Journal of General Virology 1992; 73: 423–428.
17.Wu, TC, Mounts, P. Transcriptional regulatory elements in the noncoding region of human papillomavirus type 6. Journal of Virology 1988; 62: 4722–4729.
18.Hubert, WG. Variant upstream regulatory region sequences differentially regulate human papillomavirus type 16 DNA replication throughout the viral life cycle. Journal of Virology 2005; 79: 5914–5922.