Drupal-Bibcite0<style face="normal" font="default" size="100%">Kidney function and the comparative effectiveness and safety of direct oral anticoagulants versus warfarin in adults with atrial fibrillation: a multicenter observational study</style><style face="normal" font="default" size="100%">Kidney function and the comparative effectiveness and safety of direct oral anticoagulants versus warfarin in adults with atrial fibrillation: a multicenter observational study</style>