Evidence for a causal association between human papillomavirus and a subset of head and neck cancers - Gillison, M L; Koch, W M; Capone, R B; Spafford, M; Westra, W H; Wu, L; Zahurak, M L; Daniel, R W; Viglione, M; Symer, D E (Journal of the National Cancer Institute, 2000)
et al