@article{ref1,
title="Vitamin A deficiency with xerophthalmia and night blindness in cystic fibrosis",
journal="American journal of diseases of children (1960)",
year="1968",
author="Petersen, R. A. and Petersen, V. S. and Robb, R. M.",
volume="116",
number="6",
pages="662-665",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-922X",
doi="",
url="http://dx.doi.org/"
}