title: Dietary fiber: is it really helpful?
mesh_terms: D000368:Aged; D003110:Colonic Neoplasms / Q000453:epidemiology; D003431:Cross-Cultural Comparison; D003906:Developing Countries; D004032:Diet; D004043:Dietary Fiber; D006801:Humans; D012004:Rectal Neoplasms / Q000453:epidemiology