Exploring novel biomarkers in pediatric ulcerative colitis: The role of Lipocalin-2, MMP-9, and MMP-9/LCN-2 complex. - D'Arcangelo G; Paparella R; Gravina A; Tarani F; Tarani L; Aloi M; Petrella C (Digestive and liver disease : official journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver, 2026)