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Authors
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Funding
Funding for this research was provided by:
China Primary Health Care Foundation (YNKTQN20180212)
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Article History
Received: 19 February 2021
Accepted: 3 April 2021
First Online: 21 April 2021
Declarations
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: The research was reviewed and approved by the Ethics Committee of Beijing Youan Hospital Capital Medical University. The Ethics Committee archive number is LL-2019-176-K, and the approval number is [2020]035.All the participants provided informed consent.
: Written informed consent for publication was obtained from all participants.
: The authors declare that they have no competing interests
