- Correspondence to Professor Ling Qin, Prince of Wales Hospital, Hong Kong, China; ; Professor Kingston King-lun Mak, Joint Center for Musculoskeletal Research, Guangzhou Regenerative Medicine and Health-Guangdong Laboratory, Guangzhou, China;
- Received July 31, 2018
- Revised January 4, 2019
- Accepted January 7, 2019
- First published February 11, 2019.
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