title: Letter: Diverticulitis and fistula formation.
mesh_terms: D003108:Colonic Diseases / Q000209:etiology*; D003424:Crohn Disease / Q000150:complications; D004239:Diverticulitis, Colonic / Q000150:complications*; D006801:Humans; D007412:Intestinal Fistula / Q000209:etiology*