@article{ref1,
title="Diet in Relation to Health: Dark Adaptation as Index of Vitamin A Intake",
journal="British medical journal: BMJ",
year="1937",
author="Mutch, J. R. and Griffith, H. D.",
volume="2",
number="4002",
pages="565-570",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}