@article{ref1,
title="Theophylline toxicity",
journal="Journal of emergency medicine",
year="1993",
author="Clark, Richard F.",
volume="11",
number="4",
pages="480-482",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0736-4679",
doi="",
url="http://dx.doi.org/"
}