Thromboprophylactic effect of the diabody in a model of venous thromboembolism. Fibrin deposition in lungs from endotoxemic mice (n = 6-10), expressed in fibrinogen equivalents. Baseline levels were obtained by isolating lungs from healthy mice (n = 5) without thrombotic challenge. Data are represented as mean ± SEM. **P < .01. Db, diabody.