Ethics approval and consent to participate
The requirement of ethical approval for this was waived by the Institutional Review Board of Tianjin Medical University General Hospital, because the data was accessed from MIMIC III database and MIMIC IV database (publicly available database). The need for written informed consent was waived by the Institutional Review Board of Tianjin Medical University General Hospital due to retrospective nature of the study. All methods were performed in accordance with the relevant guidelines and regulations.