- Correspondence to Dr Ya-yun Wang, Changle West Road 169, Xi'an 710032, China; , or Dr Yan-ling Yang, Department of Hepatobiliary Surgery, Xi-Jing Hospital, The Fourth Military Medical University, Xi'an 710032, China;
- Received April 21, 2012
- Revised July 23, 2012
- Accepted September 17, 2012
- First published October 22, 2013.
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