Funding for this research was provided by:
National Planning Office of Philosophy and Social Science (18BGL243)
Received: 16 January 2021
Accepted: 21 June 2021
First Online: 9 July 2021
: This study was approved by the Academic Research Ethics Committee of Nanjing Medical University; reference number: 2020617.
: Not applicable.
: The authors declare no conflict of interest.