Apixaban compared with warfarin in patients with atrial fibrillation and previous stroke or transient ischaemic attack: a subgroup analysis of the ARISTOTLE trial

J Donald Easton, Renato D Lopes, M Cecilia Bahit, Daniel M Wojdyla, Christopher B Granger, Lars Wallentin, Marco Alings, Shinya Goto, Basil S Lewis, Mårten Rosenqvist, Michael Hanna, Puneet Mohan, John H Alexander, Hans-Christoph Diener, ARISTOTLE Committees and Investigators