Li, Ying
Fan, Xue
Wei, Lifeng
Yang, Kai
Jiao, Mingli
Funding for this research was provided by:
National Natural Science Foundation of China (72174049, 72174049, 72174049, 72174049)
Article History
Received: 11 October 2022
Accepted: 24 February 2023
First Online: 2 March 2023
Declarations
:
: All methods were performed in accordance with relevant guidelines and regulations (declaration of Helsinki). The protocol was approved by the Institutional Review Committee of National Center for Health Statistics. All the participants signed the informed consent forms.
: Not applicable.
: The authors declare that they have no competing interests.