- Correspondence to Dr Zhaoshen Li, Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China; and Dr Xiangyu Kong, Department of Gastroenterology, Changhai Hospital, the Second Military Medical University, 168 Changhai Road, Shanghai 200433, China;
- Received November 30, 2017
- Accepted December 7, 2017
- First published December 15, 2017.
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