Short-Term Apixaban for Documented Left Atrial Appendage Thrombus in High-Risk Atrial Fibrillation Patients Undergoing Left Atrial Appendage Occlusion - Ding, Wern Yew; Lip, Gregory Y.H.; Fairbairn, Timothy; Binukrishnan, Sukumaran; Khalatbari, Afshin; Velavan, Periaswamy; Gupta, Dhiraj (TH Open, 2020)