Gareev, I,
Gileva, Y,
Dzidzaria, A,
Beylerli, O,
Pavlov, V,
Agaverdiev, M,
Mazorov, B,
Biganyakov, I,
Vardikyan, A,
Jin, M,
Ahmad, A (2021) , is also a difficult task. When surgery and chemotherapy fail,
radiation therapy becomes the treatment