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Authors
Yang, Zhengyang
Zhang, Xiao
Zhang, Jie
Gao, Jiale
Bai, Zhigang
Deng, Wei
Chen, Guangyong
An, Yongbo
Liu, Yishan
Wei, Qi
Han, Jiagang
Li, Ang
Liu, Gang
Sun, Yi
Kong, Dalu
Yao, Hongwei
Zhang, Zhongtao
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Funding
Funding for this research was provided by:
China Association of Gerontology and Geriatrics
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Article History
Received: 6 January 2022
Accepted: 17 April 2022
First Online: 27 April 2022
Declarations
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: This study will be conducted in compliance with the principles of the Declaration of Helsinki 2013 (www.wma.net). This study has been approved by Ethics committee of Beijing Friendship Hospital, Capital Medical University (Approval number: 2021-P2-110–01) and by the institutional review boards of all the participating centres (see the Acknowledgements section). The written informed consent of all participants was required prior to participation in the study. Participants will not be identified in any reports or publications.
: Not applicable.
: The authors declare that they have no competing interests.
