OPPORTUNITIES FOR SURGICAL TREATMENT OF ELDERLY PATIENTS WITH HEAD AND NECK TUMORS СтатьяYakovleva L.P., Kropotov M.A., Khodos A.V., Tigrov M.S., Vyalov A.S., Gavrishchuk P.A., Bochkar V.A., Guseinov I.I., Alizade G.R.ORAL ONCOLOGY. Том 118. 2021.