Article History
Received: 1 December 2020
Revised: 2 July 2021
Accepted: 5 July 2021
First Online: 17 July 2021
Declarations
:
: The procedure of this study was reviewed and approved by the IRB of Beijing Normal University. Written consent was obtained from the participants of this study.
: Consent for publication was obtained for this study.
: The authors declare no competing interests.