TY - JOUR AU - Granger, C B; Alexander, J H; McMurray, J JV TI - Apixaban versus warfarin in patients with atrial fibrillation JO - N Engl J Med VL - 365 PY - 2011 DO - 10.1056/NEJMoa1107039 L3 - PubMed-ID: 21870978 SP - 981 EP - 992 N1 - et al. ER -