Funding for this research was provided by:
Lishui County of Foshan (201762)
Received: 30 November 2021
Accepted: 26 April 2022
First Online: 29 April 2022
: Ethical approval was obtained from the Research Ethics Board of Southern Medical University on 1st November 2020. Informed consent was obtained from all subjects. All protocols are carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.