Estêvão, Roberto, Tiago Santos, Ana Ferreira, Anabela Machado, João Fernandes, and Eurico Monteiro. 2016. “Epidemiological and Demographic Characteristics of Patients With Head and Neck Tumours in the Northern Portugal: Impact on Survival”. Acta Médica Portuguesa 29 (10). Lisbon, Portugal:597-604. https://doi.org/10.20344/amp.7003.