Funding for this research was provided by:
The Fundamental Research Funds for the Central Universities (13ykpy49)
National Natural Science Foundation of China (81402003)
Guangdong Science and Technology Program (2013B021800170)
Received: 27 February 2018
Accepted: 28 June 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: Ethics committee of Sun Yat-Sen University Cancer center approved this study. The Ethics code is B2015–020-01. All patients provided their written informed consent prior to enrolling in the study.
: Not applicable.
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