Fu, Yanan
Wang, Guan
Liu, Junhui
Li, Meng
Dong, Meng
Zhang, Chen
Xu, Rui
Liu, Xinjie http://orcid.org/0000-0002-5567-4702
Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR201808010011)
Qilu Hospital of Shandong University (2019QLQN28)
National Natural Science Foundation of China (82171352)
Article History
Received: 11 August 2021
Revised: 16 December 2021
Accepted: 17 December 2021
First Online: 29 January 2022
Declarations
:
: The survey protocol was approved by the Centers for Disease Control and Prevention (CDC) and the National Center for Health Statistics (NCHS) Ethics Review Board, and all participants provided written informed consent.
: All participants provided written informed consent.
: Not applicable.
: The authors declare no competing interests.