Dietary Habits, Nutritional Knowledge, and Quality of Life Among Patients with Gastrointestinal Cancers: An Exploratory Cross-Sectional Survey - Katarzyna Antosik; Damian Dyńka; Elżbieta Krzęcio-Nieczyporuk; Maja Księżopolska; Milena Kobylińska; Katarzyna Kurowska (Journal of Clinical Medicine, 2026)