- Correspondence to Dr Xiangsheng Fu, Department of Gastroenterology, The Affiliated Hospital of Luzhou Medical College, Street Taiping 25#, Region Jiangyang, Sichuan 646000, China;
- Received November 26, 2013
- Revised January 24, 2014
- Accepted January 27, 2014
- First published February 25, 2014.
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