Funding for this research was provided by:
National Natural Science Foundation of China (31800823, 31870980, 31570003)
Text and Data Mining valid from 2020-01-13
Received: 7 November 2019
Accepted: 6 January 2020
First Online: 13 January 2020
Ethics approval and consent to participate
: All patients signed informed consent forms before participating in this study, and this study has been ratified by Ethical Commission Chongqing University.
: Not applicable.
: The authors declare that they have no competing interests.