Funding for this research was provided by:
the National Key R&D Program of China (2017YFC0112000)
the National Scientific Foundation Committee of China (81871374, 91859201, 81627803)
Clinical Research Support Foundation of the Chinese PLA General Hospital. (2017FC-CXYY-3005)
State Key Project on Infectious Disease of China (2018ZX10723204)
Text and Data Mining valid from 2020-01-20
Received: 13 May 2019
Accepted: 6 January 2020
First Online: 20 January 2020
Ethics approval and consent to participate
: This study was approved by the Chinese PLA General Hospital Ethics Board. Due to the retrospective nature of the study, informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.