Case fatality rates of recurrent thromboembolism and bleeding in patients receiving direct oral anticoagulants for the initial and extended treatment of venous thromboembolism: a systematic review - Gómez-Outes, A; Lecumberri, R; Suárez-Gea, M L; Terleira-Fernández, A I; Monreal, M; Vargas-Castrillón, E (J Cardiovasc Pharmacol Ther, 2015)