"Intestines"[Mesh:NoExp] OR "Intestine, Large"[Mesh] OR "Intestine, Small"[Mesh] OR "Upper Gastrointestinal Tract"[Mesh] OR intestin*[tw] OR gastrointestin*[tw] OR gut*[tw] OR colon[tw] OR colonic[tw] OR sigmoid*[tw] OR duodenum[tw] OR duodenal[tw] OR cecal[tw] OR cecum[tw] OR caecal[tw] OR caecum[tw] OR ileum[tw] OR ileal[tw] OR jejun*[tw] OR bowel*[tw] OR alimentary[tw] OR digestiv*[tw]
