Lu, Liyong
Lin, Xiaojun
Pan, Jay
Article History
Received: 13 July 2021
Accepted: 24 November 2021
First Online: 10 December 2021
Declarations
:
: Ethics approval and consent to participate are not applicable. This study was based on secondary data from the Sichuan Provincial Health Statistics Support System Database. All data were de-identified and the manuscript does not contain any individual person’s data. Therefore, this study was exempted from ethics approval and consent to participate.The authors obtained all necessary administrative permission from the Health Commission of Sichuan Province to access data used in this study. All methods and processes carried out in this study were in accordance with relevant guidelines and regulations in China.
: Not applicable.
: The authors declare that they have no competing interests.