Role of Oral Nutritional Supplements in Minimizing the Risk of Postoperative Malnutrition in Patients Undergoing Gastrointestinal Surgery. - Cwaliński, Jarosław; Bobkiewicz, Adam; Cwalińska, Agnieszka; Zasada, Wiktoria; Cholerzyńska, Hanna; Banasiewicz, Tomasz; Kuczyńska, Barbara (Journal of Clinical Medicine, 2026)