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Authors
Wang, Xuefei
Zhao, Junjie
Fairweather, Mark
Yang, Tingsong
Sun, Yihong
Wang, Jiping https://orcid.org/0000-0002-7466-098X
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Article History
Received: 29 June 2019
Accepted: 16 September 2019
First Online: 9 November 2019
Ethics approval and consent to participate
: The National Cancer Database (NCDB) is a joint project of the Commission on Cancer (CoC) of the American College of Surgeons and the American Cancer Society. The CoC’s NCDB and the hospitals participating in the CoC NCDB are the source of the de-identified data used herein; they have not verified and are not responsible for the statistical validity of the data analysis or the conclusions derived by the authors. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.
