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Authors
Han, Lizhen
Jia, Jinzhu
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Funding
Funding for this research was provided by:
Peking University Start-up Grant (71013Y2114)
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Article History
Received: 19 September 2021
Accepted: 27 November 2021
First Online: 3 December 2021
Declarations
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: The Research Ethics Committees of Peking University (number IRB00001052-13074) and Duke University granted approval for the CLHLS, including collections of questionnaire data with written informed consent before participation. The study was performed in accordance with the Declaration of Helsinki. This study only showed the secondary aggregated data, and we did not include any data of their personal information, including name, identity information, address, telephone number, etc. None of the authors in this study had access to identifying patient information during the analysis of the data.
: Not applicable.
: The authors declare no competing interests.
