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Authors
Yan, Qinghu
Wang, Wuzhang
Zhao, Wenlong
Zuo, Liping
Wang, Dongdong
Chai, Xiangfei
Cui, Jia
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Funding
Funding for this research was provided by:
Shandong medical and health science and technology development plan project (2019WS535, 2019WS535, 2019WS535)
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Article History
Received: 27 April 2021
Accepted: 24 November 2021
First Online: 7 January 2022
Declarations
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: All authors attest that they meet the Helsinki declaration. The authors declare that they consent to participate.
: Not applicable.
: This retrospective studies included all subjects are under 18 and informed consent obtained from a parent and/or legal guardian.
: The authors declare that they have no competing interests.
