Efficacy and Safety of Direct Oral Anticoagulants for Stroke Prevention in Older Patients With Atrial Fibrillation: A Network Meta‐Analysis of Randomized Controlled Trials oleh Donna Shu‐Han Lin, Hao‐Yun Lo, Kuan‐Chih Huang, Ting‐Tse Lin, Jen‐Kuang Lee