Histological activity predicts relapse in pediatric ulcerative colitis despite mucosal healing: a multicenter study from the pediatric IBD Porto group of ESPGHAN. - Mažuranić, Ivana Trivić; Aloi, Marina; Bramuzzo, Matteo; Chiantese, Claudia; D'Arcangelo, Giulia; Gattenlöhner, Stefan; Gianolio, Laura; Granot, Maya; Gülşen, Hayriye Hızarcıoğlu; Hussey, Seamus (Journal of Crohn's & Colitis, 2026)