Funding for this research was provided by:
Natural Science Foundation of Zhejiang Province (LY14H160010)
Zhejiang Medical Science and Technology Project (2017194140)
Text and Data Mining valid from 2018-11-21
Received: 27 November 2017
Accepted: 10 October 2018
First Online: 21 November 2018
Ethics approval and consent to participate
: Not applicable.Because this study was a retrospective study, the ethics approval and consent to participate were waived by the Medical Ethics Committee of Zhejiang Cancer Hospital.
: Not applicable.No details on individual patients have been reported in the manuscript, so the consent for publication was not applicable.
: All the authors declare that they have no conflict of interests.
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