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Authors
Wang, Jia-li
Guo, Chun-yan
Chen, Hui
Li, Hong-wei
Zhao, Xue-qiao
Zhao, Shu-mei https://orcid.org/0000-0002-7457-7887
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Article History
Received: 10 December 2020
Accepted: 23 February 2021
First Online: 4 March 2021
Declarations
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: The study data collections were approved by the Institutional Ethics Committee of Beijing Friendship Hospital affiliated to Capital Medical University. The study was also in accordance with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.
