Funding for this research was provided by:
Sichuan Province Science and Technology Support Program (2020YFS0015, 2020YFS0091, 2021YFS0001-LH, 2019-YF05-00333-SN, 2020YFS0015, 2020YFS0091, 2021YFS0001-LH, 2019-YF05-00333-SN)
Sichuan University (2018hhf-26, 2018HXFH010, 2018hhf-26, 2018HXFH010)
Health Commission of Sichuan province (20PJ092)
National Natural Science Foundation of China (81602935)
Chongqing Science and Technology Program (cstc2020jscx-cylhX0003)
Central government funding items (2021zc02)
Liangshan Yi autonomous prefecture Center for Disease Control and Prevention (H210322)
Received: 15 September 2021
Accepted: 6 January 2022
First Online: 13 January 2022
: This study design was reviewed and approved by the Ethics Committee of Sichuan University (KS2020269). This study used de-identified data, and the waiver of informed consent was reviewed and approved by the Sichuan University Institutional Review Board.
: Not applicable.
: The authors declare that they have no competing interests.