Investigating constipation.
D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis; D003248:Constipation / Q000209:etiology*; D004043:Dietary Fiber; D004241:Diverticulum, Colon / Q000175:diagnosis; D006801:Humans; D007415:Intestinal Obstruction / Q000175:diagnosis; D008531:Megacolon / Q000175:diagnosis