Funding for this research was provided by:
National Natural Science Foundation of China (71874104, 72104098)
National Key R&D Program of China (2020YFC2006400)
Philosophy and Social Sciences of Guangdong College for the project of “Public Health Policy Research and Evaluation” Key Laboratory (G620369695)
Guangdong Basic and Applied Basic Research Foundation (2020A1515110369)
Project funded by China Postdoctoral Science Foundation (2021M701592)
Received: 16 August 2021
Accepted: 10 December 2021
First Online: 10 January 2022
: All study procedures were approved by the Ethics Committee of Shanxi Medical University (reference number was 2018LL177). All participants were informed of the purpose of this research and signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.