title: Letter: On the etiology of ulcerative colitis.
mesh_terms: D000818:Animals; D001341:Autonomic Nervous System / Q000503:physiopathology*; D003093:Colitis, Ulcerative / Q000209:etiology* / Q000503:physiopathology; D003106:Colon / Q000098:blood supply* / Q000294:innervation; D005769:Gastrointestinal Motility; D006801:Humans; D007413:Intestinal Mucosa / Q000098:blood supply*; D008833:Microcirculation; D010275:Parasympathetic Nervous System / Q000503:physiopathology; D010528:Peristalsis; D014666:Vasomotor System / Q000503:physiopathology