Funding for this research was provided by:
The National Natural Science Foundation of China (no. 71874002)
National Nature Science Foundation of China (NSFC71704003)
Major Project of Humanities and Social Sciences Research in Anhui Higher Education Institutions (SK2017A0169)
Received: 14 July 2020
Accepted: 4 February 2021
First Online: 27 February 2021
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of Anhui Medical University (AMUREC:20170260) and the study team obtained informed consent from all participants. Participants were made aware that they could withdraw at any time.
: Not applicable.
: The authors declare that they have no competing interests.