Outcomes and safety of antithrombotic treatment in patients aged 80 years or older with nonvalvular atrial fibrillation. - Ruiz Ortiz M; Romo E; Mesa D; Delgado M; Ibáñez CL; Anguita M; Castillo JC; Arizón JM; Suárez de Lezo J (American Journal of Cardiology, 2011)