Funding for this research was provided by:
National Natural Science Foundation of China (31670940/ C080904)
Text and Data Mining valid from 2020-04-09
Received: 1 December 2019
Accepted: 2 April 2020
First Online: 9 April 2020
Ethics approval and consent to participate
: The study has been approved by institutional Review Board of Air Force Military Medical University Second Affiliated Hospital (Tangdu). The approval number is TDLL201804-33.
: The authors declare no conflict of interest.