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Authors
Gao, L. F.
Jia, S.
Zhang, Q. M.
Xia, Y. F.
Li, C. J.
Li, Y. H. https://orcid.org/0000-0002-0819-7827
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Article History
Received: 1 February 2021
Accepted: 8 July 2021
First Online: 27 July 2021
Declarations
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: The authors declare that they have no conflict of interest.
: The study was approved by Ethical Committee of Weifang Weiyi Tumor Hospital and conducted in accordance with the ethical standards. Approval No. 2012-11.
: All procedures carried out in studies involbing human participants are consistent with the ethical standards of institutions and/or national research councils, as well as with the 1964 Helsinki Declaration and its subsequent amendments or similar ethical standards.
: Subjects signed the informed consent.
