Funding for this research was provided by:
National Key R&D Program of China (2016YFC0105606)
Text and Data Mining valid from 2020-02-26
Received: 20 October 2019
Accepted: 11 February 2020
First Online: 26 February 2020
Ethics approval and consent to participate
: This study has obtained ethics approval and consent of the ethics committee in our hospital.
: Not applicable
: The authors declare that they have no competing interests.