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Li-Fang Kang, Zheng-Lin Zhu*, Qian Zhao, Li-Yong Chen* and Ze Zhang
* Corresponding authors: Zheng-Lin Zhu zhuzl@cqu.edu.cn - Li-Yong Chen mzkcly@yahoo.com.cn
BMC Evolutionary Biology 2012, 12:128 doi:10.1186/1471-2148-12-128