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The absolute risk of a tumoural lesion diagnosis in the (A) gastrointestinal, (B) respiratory tract, (C) intracranial, (D) urological region following oral anticoagulant (OAC) initiation in atrial fibrillation patients, stratified according to the experience of a site-specific bleeding event. The follow-up started at the onset of an OAC-related bleeding (solid line), whereas at the time of OAC initiation in case no bleeding occurred (dashed line).
