Zhao, Dan
Li, Jie
Gao, Tingting
Sun, Jingjie
Wang, Yi
Wang, Qiong
Zhou, Chengchao
Funding for this research was provided by:
National Natural Science Foundation of China (71774104, 71473152, 71974117)
China Medical Board (16-257)
Cheeloo Youth Scholar Grant
Shandong University (FYT1810, IFYT18032, 2012DX006)
NHC Key Laboratory of Health Economics and Policy Research (NHC-HEPR2019014)
Article History
Received: 21 September 2021
Accepted: 31 January 2022
First Online: 14 February 2022
Declarations
:
: This study protoco was approved and organized by Health Commission of Shandong Province. This study was reviewed and approved by the Institutional Review Board (Academic Research Ethics Committee) of Shandong University School of Public Health. All procedures were in accordance with the ethical standards of the Helsinki Declaration. Written informed consents clarifying the study purposes were obtained from each participant.
: Not applicable
: The authors declare that they have no competing interests.