Funding for this research was provided by:
National Natural Science Foundation of China (NSFC, No. 81874227)
Guangzhou Health Care and Cooperative Innovation Major Project (No.201704020224)
Training Project of Young teacher of Sun Yat-Sen University (H1617)
the Science and Technology Program of Huizhou (170520181743174/2017Y229, 180529101741637/2018Y305)
Text and Data Mining valid from 2019-11-06
Received: 24 July 2019
Accepted: 9 September 2019
First Online: 6 November 2019
Ethics approval and consent to participate
: This research was approved by the Institutional Ethics Committee for Clinical Research and Animal Trials of the First Affiliated Hospital, Sun Yat-sen University.
: All authors have agreed to publish this manuscript.
: The authors declare that they have no competing interests.