Funding for this research was provided by:
Natural Science Foundation of Liaoning Province of China (No. 20180530044)
The Joint Program of Key Research and Development of Liaoning Province of China (No. 2020JH2/10300138)
Received: 7 April 2021
Accepted: 14 August 2021
First Online: 12 September 2021
: The FNIH in OAI was approved by the Institutional Review Board of the University of California, San Francisco, and all sites(University of Maryland School of Medicine, The Ohio State University, University of Pittsburgh, Memorial Hospital of Rhode Island) participating in the osteoarthritis initiative study. The OAI study was compatible with the Declaration of Helsinki (World Medical Association) and all amendment made after. All participants signed informed consent forms.
: Not applicable.
: The authors declare that they have no conflicts of interest.