Funding for this research was provided by:
National Social Science Fund Youth Project (18BGL243)
Received: 23 September 2020
Accepted: 12 January 2021
First Online: 21 January 2021
Ethics approval and consent to participate
: This study was approved by the Academic Research Ethics Committee of Nanjing Medical University. All procedures were in accordance with the ethical standards of the Helsinki Declaration. Participants provided informed consent prior to data collection.
: Not applicable.
: The authors declare that they have no competing interests.