Dong, Gaiying
Gan, Man
Xu, Shilin
Xie, Yanlin
Zhou, Ming
Wu, Liangliang
Article History
Received: 25 June 2023
Accepted: 18 September 2023
First Online: 29 September 2023
Declarations
:
: The original survey protocol was approved by the Institutional Review Board of the National Center of Heath Statistics. All participants signed informed consent forms. The present study was deemed exempt by the Institutional Review Board of our center.
: All authors read the manuscript and agreed to its publication.
: The authors declare no competing financial interests.