Funding for this research was provided by:
National Natural Science Foundation of China (81572865, 81402560, 81472387)
Guangdong Science and Technology Department (2017A020215029, 2014A020212584)
Received: 14 October 2018
Accepted: 30 July 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Ethics Committee of the Sun Yat-sen University Cancer Center, and consent for participation and publication was obtained from all the patients included in the study and is available for review at any time.
: Not applicable.
: The authors declare that they have no competing interests.