Funding for this research was provided by:
National Natural Science Foundation of China (81171890, 81672390)
Federal State Budget Scientific Institution Research Institute - Republican Research and Consulting Center of Expertise (No. 2013CB910304)
Received: 10 January 2019
Accepted: 12 April 2019
First Online: 27 April 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Sun Yat-sen University Cancer Center. All procedures performed in the present study involving human participants were in accordance with the ethical standards of institutional and/or national research committees and the 1964 Helsinki Declaration and its later amendments or similar ethical standards. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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