For citations:
Kuchin D.M., Kolesnik Ya.I., Torgomyan H.G., Zagainov V.E. Factors affecting overall survival in ductal adenocarcinoma of the pancreatic head. Experience of one center. Malignant tumours. 2021;11(1):20-28. (In Russ.) https://doi.org/10.18027/2224-5057-2021-11-1-20-28