Preoperative oxidative stress as a biomarker of postoperative complications in colorectal cancer patients - Zaręba, Konrad; Dorf, Justyna; Cummings, Kerianne M.; Maciejczyk, Mateusz; Zalewska, Anna; Kędra, Bogusław (Gastroenterology Review/Przegląd Gastroenterologiczny, 2025)