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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81502023)
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Article History
Received: 6 November 2017
Accepted: 19 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences (Beijing, China). Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
