Significant differences were observed between the survival and death groups in clinical manifestations—such as gastrointestinal bleeding, dizziness, headache, delirious coma, infection, and shortness of breath—and in biochemical indicators, including alanine transaminase (ALT), aspartate transaminase (AST), prothrombin time and activated partial thromboplastin time (APTT). Here, F2 is linked to infection.