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ModerateE). Warfarin is acceptable but not preferred without specific indications (B). No therapy is inappropriate (D)."Atrial Fibrillation"easy"

A 72-year-old with nonvalvular atrial fibrillation has CHA₂DS₂‑VASc score 3 and no mechanical valve or moderate-severe mitral stenosis. What is the preferred long-term stroke prevention?

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