Liu, Li
Li, Yanxia
Song, Junmin
Chen, Qian
Li, Shuang
Mu, Huijuan
Na, Jun
Zhang, Rui
Yu, Liya
Sun, Wei
Pan, Guowei http://orcid.org/0000-0003-2238-0801
Article History
Received: 23 March 2021
Accepted: 8 August 2021
First Online: 2 September 2021
Declarations
:
: The secondary data taken from the Vital Registry System of LNCDCP is used and no human participants are involved. The study protocol was approved by the Ethnic committee of LNCDCP.
: Not applicable.
: The authors declare that they have no conflicts of interest.