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Authors
Wang, Yadong
Liu, Jichang
Huang, Cuicui
Zeng, Yukai
Liu, Yong
Du, Jiajun http://orcid.org/0000-0003-2406-9435
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81672288)
Key Research and Development Plan of Shandong Province (2018GSF118028)
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Article History
Received: 3 May 2020
Accepted: 14 January 2021
First Online: 10 February 2021
Ethics approval and consent to participate
: This study was based on publicly available data from the SEER database, and did not involve interaction with human subjects or the use of personally identifiable information. The study did not require informed consent for SEER registration cases, and the author obtained a “limited use data agreement” from SEER. No trial registration was required.
: Not applicable.
: There is no competing interest regarding the publication of this paper.
