P2246Effectiveness and safety of oral anticoagulants in patients aged 90 years or older with atrial fibrillation. (28th August 2018) - Giustozzi, M G; Vedovati, M C; Verso, M; Conti, S; Verdecchia, P; Bogliari, G; Pierpaoli, L; Agnelli, G; Becattini, C