<?xml version="1.0"?>
<coauthors author="Yan-chao Yin" urlpt="y/Yin:Yan=chao">
<author urlpt="g/Guo:Cheng" count="1">Cheng Guo</author>
<author urlpt="s/Sun:Lin=fu" count="1">Lin-fu Sun</author>
</coauthors>

