Bartholomay, E.; Polli, I.; Borges, A. P.; Kalil, C.; Arroque, A.; Kohler, I.; Danzmann, L. C. Prevalence of Oral Anticoagulation in Atrial Fibrillation . Clinics 2014, 69 (9), 615-620. https://doi.org/10.6061/clinics/2014(09)07.