- Correspondence to Professor Guanghua Lei, Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China; ; Professor Yuqing Zhang, Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA;
- Received April 28, 2020
- Revised July 29, 2020
- Accepted August 3, 2020
- First published September 16, 2020.
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