1)Ogawa S, Hori M:Urgent statement on antithrombotic therapy of atrial fibrillation. Circ J 75:2719-2721, 2011
2)White HD, et al:Comparison of outcomes among patients randomized to warfarin therapy according to anticoagulant control;Results from SPORTIF III and V. Arch Intern Med 167:239-245, 2007
3)The ACTIVE Writing Group on behalf of the ACTIVE Investigators:Clopidogrel plus aspirin versus oral anticoagulation for atrial fibrillation in the Atrial fibrillation Clopidogrel Trial with Irbesartan for prevention of Vascular Events(ACTIVE-W);A randomised controlled trial. Lancet 367:1903-1912, 2006
4)Connolly SJ, et al:Dabigatran versus warfarin in patients with atrial fibrillation. N Engl J Med 361:1139-1151, 2009
5)Patel MR, et al:Rivaroxaban versus warfarin in nonvalvular atrial fibrillation. N Engl J Med 365:883-891, 2011
6)Granger CB, et al:Apixaban versus warfarin in patients with atrial fibrillation. N Eng J Med 365:981-992, 2011