- Correspondence to Professor Zhao-Shen Li, Department of Gastroenterology, Digestive Endoscopy Center, Changhai Hospital, the Second Military Medical University, Shanghai, 200433, China; and Dr. Zhuan Liao, Department of Gastroenterology, Changhai Hospital, the Second Military Medical University, Shanghai, China;
- Received August 31, 2017
- Accepted September 8, 2017
- First published September 26, 2017.
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