The Influence of Renal Function on Safety and Effectiveness of Oral Anticoagulant Treatment among Frail Elderly Patients with Non-Valvular Atrial Fibrillation and Chronic Kidney Disease. - Qutub MA; Algazzar AS; Alassiri AK; Albukhari SA; Bokhary AH; Almarghany AA; Elsayed AA; Elbably MM (Cardiology, 2026)