- Correspondence to Dr Yuling Sun, Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, School of Medicine, Institute of Hepatobiliary and Pancreatic Diseases, Zhengzhou University, 1 Jianshe Road, Zhengzhou 450052, P.R. China;
- Accepted 3 May 2012
- Published online 9 November 2012.
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