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Authors
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Funding
Funding for this research was provided by:
the National Natural Science Foundation of China (81672465)
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Article History
Received: 2 August 2019
Accepted: 2 February 2021
First Online: 10 February 2021
Ethics approval and consent to participate
: The research protocol was approved by the Ethics Committee of the General Hospital of Northern Theater Command (approval no. K(2011)49). Informed written consent was obtained for all participants.
: Not applicable.
: There were no any financial and non-financial competing interests in this article.
