
Keywords: هپارین های کم مولکولی; Deep-vein thrombosis; Developing country; Neurosurgery; Postoperative; Pulmonary embolism; Venous thromboembolism; CT; Computed tomography; CTA; Computed tomographic angiography; Doppler USS; Doppler ultrasound scan with B-mode imaging; DVT; Deep-vein thr