@article{ref1,
title="Surveillance into crowd control agents",
journal="Lancet",
year="1998",
author="Wheeler, H. and MacLehose, R. and Euripidou, E. and Murray, V.",
volume="352",
number="9132",
pages="991-992",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0140-6736",
doi="10.1016/S0140-6736(05)61550-4",
url="http://dx.doi.org/10.1016/S0140-6736(05)61550-4"
}