Liang Xue-Song*, Li Cheng-Zhong, Zhou Ying and Wan Mo-Bin*
* Corresponding authors: Liang Xue-Song liangxuesong2000@163.com - Wan Mo-Bin mobinwan@yahoo.com.cn
BMC Gastroenterology 2012, 12:43 doi:10.1186/1471-230X-12-43
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