1. Freddie, B. et al. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J. Clin. 1, 1 (2018).
2. Maier, H., Dietz, A., Gewelke, U., Heller, W. D. & Weidauer, H. Tobacco and alcohol and the risk of head and neck cancer. Clin. Investig. 70(3–4), 320–327 (1992).
3. Michaud, D. S., Langevin, S. M., Eliot, M., Nelson, H. H. & Kelsey, K. T. High-risk HPV types and head and neck cancer. Int. J. Cancer 135(7), 1653–1661 (2014).
4. Stein, A. P. et al. Prevalence of human papillomavirus in oropharyngeal cancer: A systematic review. Cancer J. 21, 1 (2015).
5. Gatta, G. et al. Prognoses and improvement for head and neck cancers diagnosed in Europe in early 2000s: The EUROCARE-5 population-based study. Eur. J. Cancer. 1, 1 (2015).