Reigota, Catarina, Helena Rodrigues, and Sónia Moreira. “The Comb Sign As a Fast Path for Crohn’s Disease Diagnosis”. SPMI Case Reports 1, no. 4 (November 29, 2023): 199–200. Accessed January 21, 2025. https://casereports.spmi.pt/index.php/cr/article/view/85.