Received: 8 July 2020
Accepted: 17 January 2021
First Online: 25 January 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Central Hospital of Wuhan. Written informed consent was waived by the ethical commission due to the retrospective nature of the study. Administrative permissions to access the raw data were granted by the Central Hospital of Wuhan ethics committee. The data used in this study was anonymised before its use.
: Not applicable.
: The authors have declared they have no interest.