Article History
Received: 11 December 2020
Accepted: 14 April 2021
First Online: 21 April 2021
Declarations
:
: The study was approved by the Institutional Review Board (IRB) of Soochow University. All patient records were anonymized before analysis and the requirement for informed consent was waived by the IRB of Soochow University due to the retrospective nature of the study.
: Not applicable.
: The author declare that they have no competing interests.