Corrigendum to "Non-vitamin K antagonist oral anticoagulants in elderly patients with atrial fibrillation: A systematic review with meta-analysis and trial sequential analysis" [Arch. Gerontol. Geriatr. 81 (March–April) (2019) 209–214]. (July 2019) - Caldeira, Daniel; Nunes-Ferreira, Afonso; Rodrigues, Raquel; Vicente, Eunice; Pinto, Fausto J.; Ferreira, Joaquim J.