title: Crohn's disease: to lump or to split?
mesh_terms: D003424:Crohn Disease / Q000145:classification / Q000150:complications / Q000378:metabolism*; D006801:Humans; D007375:Interleukin-1 / Q000378:metabolism; D007416:Intestinal Perforation / Q000209:etiology; D016212:Transforming Growth Factor beta / Q000378:metabolism
chemical_list: D007375:Interleukin-1; D016212:Transforming Growth Factor beta