Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (S2013040014929, 2017A030313621)
National Natural Science Foundation of China (81300817, 81770983)
Guangzhou Science and Technology Program key projects (201907010038)
Received: 15 July 2019
Accepted: 18 September 2019
First Online: 30 September 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the ethics committee of the First Affiliated Medical Hospital of Sun Yat-sen University in Guangzhou, China.
: Not applicable.
: The authors declare that they have no competing interests.