Ullah, M, N Kar, PK Karmaker, S Alam, MS Mamun, T Rahman, SMA Habib, and AAS Majumder. 2011. “Prevention of Stroke in Nonvalvular Atrial Fibrillation”. Cardiovascular Journal 1 (1):64-71. https://doi.org/10.3329/cardio.v1i1.8217.