Source: https://www.researchgate.net/profile/Marianna-De-Camargo-Cancela-2/publication/277042230_Les_cancers_de_la_cavite_buccale_et_de_l'oropharynx_dans_le_monde_incidence_internationale_et_classification_TNM_dans_les_registres_du_cancer/links/55ffe31d08aeba1d9f84149d/Les-cancers-de-la-cavite-buccale-et-de-loropharynx-dans-le-monde-incidence-internationale-et-classification-TNM-dans-les-registres-du-cancer.pdf