Other issues of great importance for public health which was not included in these studies are recognized etiological factors such as diet salt, nitrite and nitrates intake 9, 11, 31-35.
Otro aspecto de gran importancia a nivel de salud pública, son los factores etiológicos reconocidos, como son los dietarios la ingesta de sal y de nitritos y nitratos 9, 11, 31-35, que no fueron includios en estos estudios.