Funding for this research was provided by:
National Natural Science Foundation of China (81702601, 81602791, 81673102, 81803164)
Text and Data Mining valid from 2019-11-21
Received: 19 September 2019
Accepted: 30 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: All patients gave express written informed consent. Institutional Review Board approval was not required.
: Not applicable.
: The authors declare that they have no competing interests.