@article{ref1,
title="Cone and rod function in vitamin A deficiency with chronic alcoholism and in retinitis pigmentosa",
journal="American journal of ophthalmology",
year="1977",
author="Sandberg, M. A. and Rosen, J. B. and Berson, E. L.",
volume="84",
number="5",
pages="658-665",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9394",
doi="",
url="http://dx.doi.org/"
}