- Correspondence to Dr. Min Chen, State key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Air Force Military Medical University, Xi'an, Shaanxi, China;
- Received August 20, 2020
- Revised September 8, 2020
- Accepted September 15, 2020
- First published October 1, 2020.
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