Delayed prophylaxis with unfractionated heparin increases the risk of venous thromboembolic events in patients with moderate to severe traumatic brain injury: a retrospective analysis - Brandi, Giovanna; Schmidlin, Adrian; Klinzing, Stephanie; Schüpbach, Reto; Unseld, Simone; Pagnamenta, Alberto (Anestezjologia Intensywna Terapia, 2020)