Wang, Jieru
Zhao, Jinfeng
Tian, Tingting
Jiang, Xiaoxu
Li, Hexian
Pang, Mingli
Kong, Fanlei
Funding for this research was provided by:
National Natural Science Foundation of China (NO.71804094)
China Postdoctoral Science Foundation (NO.2016M592161)
Natural Science Foundation of Shandong Province (NO.ZR2016GB02)
Postdoctoral Science Foundation of Shandong Province (NO.201603021)
Fundamental Research Funds of Shandong University (NO.2015HW002,NO.2018JC055)
Article History
Received: 18 February 2022
Accepted: 20 July 2022
First Online: 6 August 2022
Declarations
:
: The survey and data use have obtained the written informed consent of all participants. For illiterate older people, in addition to obtaining their verbal consent, we also require their legally/kin authorized representative to provide a proxy written informed consent. The research program of this was reviewed and approved by the Institutional Review Board (IRB) of Public Health and Preventive Medicine in Shandong University (No. 20180225) and was in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare no conflict of interest.