title: Demarcation of ulcerative colitis.
authors.forename: A
authors.initials: A
authors.lastname: Marston
mesh_terms: D003093:Colitis, Ulcerative / Q000473:pathology*; D003106:Colon / Q000098:blood supply* / Q000473:pathology; D006801:Humans; D007413:Intestinal Mucosa / Q000098:blood supply; D017537:Mesenteric Artery, Inferior / Q000473:pathology