@article{ref1,
title="Possible hazards of eating bracken fern",
journal="New England journal of medicine",
year="1980",
author="Caldwell, M. E. and Brewer, W. R.",
volume="303",
number="3",
pages="164-164",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="",
url="http://dx.doi.org/"
}