Liu, Xiao
Song, Yinggai
Li, Ruoyu
Wang, Aiping
Funding for this research was provided by:
Beijing Natural Science Foundation (7194326)
Article History
Received: 21 December 2020
Accepted: 10 February 2021
First Online: 5 March 2021
Declarations
:
: The authors declare that they have no conflict of interest to declare.
: This retrospective study was approved by the ethics committee of Peking University First Hospital. The need for informed consent was waived by the Clinical Research Ethics Committee.