Funding for this research was provided by:
National Natural Science Foundation of China (81771602)
Fundamental Research Funds for the Central Universities (16ykpy19)
Science and Technology Planning Project of Guangdong Province (2017A020214014)
Natural Science Foundation of Guangdong Province (2017A030313826)
Sun Yat-Sen University Clinical Research 5010 Program (2016014)
Text and Data Mining valid from 2020-02-07
Received: 1 June 2018
Accepted: 4 February 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: This study was approved by the ethical committee of The First Affiliated Hospital of Sun Yat-sen University (2017–323). The ethics committee waived the need for informed consent due to the retrospective study design.
: Not applicable.
: The authors declare that they have no conflict of interest.