@article{ref1,
title="Vitamin A deficiency as a public health problem & assessment methods",
journal="Archivos Latinoamericanos de Nutrición",
year="1992",
author="Underwood, B. A.",
volume="42",
number="3 Suppl",
pages="117S-122S",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0004-0622",
doi="",
url="http://dx.doi.org/"
}