Funding for this research was provided by:
National Natural Science Foundation of China (81972086, 81672196 and 51971222)
Article History
Received: 2 January 2021
Accepted: 10 March 2021
First Online: 1 July 2021
Declarations
:
: All procedures performed in studies involving human participants have already been in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards in the original study. (Reference: Hylkema TH, Stevens M, Van Beveren J, <i>et al</i>. Preoperative characteristics of working-age patients undergoing total knee arthroplasty. PLoS One 2017;12:e0183550. ExternalRef removedExternalRef removed).
: All procedures performed in studies involving human participants have already been in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards in the original study. (Reference: Hylkema TH, Stevens M, Van Beveren J, <i>et al</i>. Preoperative characteristics of working-age patients undergoing total knee arthroplasty. PLoS One 2017;12:e0183550. ExternalRef removedExternalRef removed).
: The authors declare that they have no competing interests.