title: [Nature, extent and significance of the problems associated with hypovitaminosis A].
mesh_terms: D000818:Animals; D001766:Blindness / Q000209:etiology; D001847:Bone Diseases / Q000209:etiology; D002493:Central Nervous System Diseases / Q000209:etiology; D005128:Eye Diseases / Q000209:etiology*; D006801:Humans; D011488:Protein Deficiency / Q000150:complications; D012871:Skin Diseases / Q000209:etiology; D014802:Vitamin A Deficiency / Q000150:complications*; D014985:Xerophthalmia / Q000209:etiology
vernacular_title: Naturaleza, alcance e importancia de los problemas asociados a la hipovitaminosis A.