Funding for this research was provided by:
National Natural Science Foundation of China (81302303)
Received: 5 April 2017
Accepted: 18 December 2017
First Online: 12 January 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Cancer Hosipital, Fudan University. All patients provided written informed consent.
: Not applicable
: The authors declare that they have no competing interests.
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