Elevated on-treatment D-dimer level is associated with major bleeding during extended anticoagulation for venous thromboembolism. - Wang H; Kovacs MJ; Lazo-Langner A; Anderson DR; Kahn SR; Castellucci LA; Schmidt J; Elias A; Righini M; Ortel TL; Huisman MV; Carrier M; et al. (Haematologica, 2026)