a The Randomised Evaluation of Long-term Anticoagulation Therapy.
b The Rivaroxaban Once Daily Oral Direct Factor Xa Inhibition Compared With Vitamin K Antagonism for Prevention of Stroke and Embolism Trial in Atrial Fibrillation.
c The Apixaban for the Prevention of Stroke in Subjects With Atrial Fibrillation.
d Effective Anticoagulation With Factor Xa Next Generation in Atrial Fibrillation.