@article{ref1,
title="Attention should be paid to preventing knee injury in tai chi exercise",
journal="Injury prevention",
year="2011",
author="Chen, Hong-Lin and Liu, Kun and You, Qin-Sheng",
volume="17",
number="4",
pages="286-287",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1353-8047",
doi="10.1136/injuryprev-2011-040027",
url="http://dx.doi.org/10.1136/injuryprev-2011-040027"
}