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Authors
Li, Yuan
Ren, Haitao
Wang, Junmei
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Funding
Funding for this research was provided by:
Zhejiang Provincial Natural Science Foundation of China (LY15H150004)
General Research Program of Zhejiang Provincial Department of Health (201345919)
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Article History
Received: 16 August 2018
Accepted: 25 June 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: Because patient data in the SEER database were de-identified, signed informed consent was waived for the present study.
: Not applicable.
: The authors declare that they have no competing interests.
