@article{ref1,
title="Playground injuries",
journal="Injury prevention",
year="2003",
author="MacKay, M.",
volume="9",
number="3",
pages="194-196",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1353-8047",
doi="",
url="http://dx.doi.org/"
}