RT Journal Article SR Electronic T1 Stroke rates vary substantially across cohorts of patients with atrial fibrillation JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP ebmed-2017-110711 DO 10.1136/ebmed-2017-110711 A1 Luciano A Sposato A1 Gustavo Saposnik YR 2017 UL http://ebm.bmj.com/content/early/2017/04/12/ebmed-2017-110711.abstract AB