- Correspondence to Professor Guohong Han, Department of Liver Diseases and Digestive Interventional Radiology, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, No 127 Changle West Road, Xi’an 710032 China;
- Received June 7, 2017
- Revised August 18, 2017
- Accepted August 21, 2017
- First published September 28, 2017.
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