Funding for this research was provided by:
China Health Promotion Foundation (XM_2020_011_0295_01)
Received: 13 October 2021
Accepted: 14 December 2021
First Online: 4 January 2022
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For retrospective studies formal consent is not required.
: For this type of study consent for publication is not required.
: The authors declare that they have no competing interests.