Funding for this research was provided by:
National Natural Science Foundation of China (81871151, 81572262)
Article History
Received: 15 August 2020
Accepted: 19 November 2020
First Online: 25 November 2020
Ethics approval and consent to participate
: An ethics statement was not required for this work. Data used in the analysis were anonymized. The NHANES database was open to the public and did not require any ethical or administrative permission.
: Not applicable.
: The authors declare no conflict of interest.