F2 and pulmonary embolism: FXai: factor Xa inhibitor; GCS: Glasgow Coma Scale; DVT: deep vein thrombosis; ICH: intracerebral hemorrhage; IPH: intraparenchymal hemorrhage; MI: myocardial infarction; TIA: transient ischaemic attack; PE: pulmonary embolism; VTE: venous thromboembolism; 4F-PCC: four-factor prothrombin complex concentrate; N: total number, C: control group, T: treatment group