- Correspondence to Dr Xin Chen, BTS, University of California San Francisco Medical Center at Parnassus, San Francisco, CA 94122, USA; ; Professor Diego F Calvisi, Institute of Pathology, University of Regensburg, Regensburg, Germany;
- Received January 21, 2020
- Revised September 25, 2020
- Accepted October 6, 2020
- First published November 3, 2020.
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