title: Letter: The bran hypothesis.
mesh_terms: D003248:Constipation / Q000209:etiology / Q000503:physiopathology; D004040:Dietary Carbohydrates; D004241:Diverticulum, Colon / Q000209:etiology; D002523:Edible Grain; D006801:Humans; D007420:Intestine, Large / Q000502:physiology / Q000503:physiopathology
chemical_list: D004040:Dietary Carbohydrates