@article{ref1,
title="Khat chewing: A smokeless gun?",
journal="Mayo Clinic proceedings",
year="2010",
author="Mateen, Farrah J. and Cascino, Gregory D.",
volume="85",
number="11",
pages="971-973",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0025-6196",
doi="10.4065/mcp.2010.0658",
url="http://dx.doi.org/10.4065/mcp.2010.0658"
}