Patti, G., Mantione, L., Bressi, E. and Bisignani, A. 2018. Efficacy and safety of oral anticoagulant therapy in frail patients with atrial fibrillation. Monaldi Archives for Chest Disease. 88, 2 (Jun. 2018). DOI:https://doi.org/10.4081/monaldi.2018.958.