ORAL MUCOSITIS IN PATIENTS WITH ONCOLOGICAL PATHOLOGY OF THE OROPHARYNGEAL REGION: REVIEW ArticleEremina A.O., Zaderenko I.A., Ivanov S.Yu., Alieva S.B., Dymnikov A.B., Khromushina A.V., Pkheshkhova B.G.Опухоли головы и шеи. Том 10. 2020. С. 72-80