Funding for this research was provided by:
Key Technologies Research and Development Program (2018YFC2000600)
Text and Data Mining valid from 2020-03-04
Received: 5 November 2019
Accepted: 26 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The research proposal was approved by the Institutional Review Board of Beijing Sport University (BSU IRB) and all participants gave written informed consent prior to study participation (2019109H).
: Not applicable, no individual person’s data was presented.
: The authors declare that they have competing interests.