The Geriatric-8 (G8) screening questionnaire as a predictor of anticancer therapy toxicity in elderly patients: a comprehensive analysis of current data - A. B. Elmurzaev; I. N. Danilov; I. V. Rykov; G. A. Chizh; T. P. Nikitina; S. O. Kuzin; O. S. Lokotosh; V. A. Mirgorodskaya (Malignant tumours, 2026)