Funding for this research was provided by:
National Natural Science Foundation of China (81772277)
Distinguished Professor of Liaoning Province (Distinguished professor of Liaoning Province)
Text and Data Mining valid from 2020-03-24
Received: 19 January 2020
Accepted: 12 March 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: The study and its informed consent have been examined and certified by the Ethics Committee of the First Affiliated Hospital of Dalian Medical University (YJ-KY-FB-2016-16).
: Not applicable.
: The authors declare that they have no competing interests.