Rationale and design of a study on D-dimer use to stratify patients after a first unprovoked venous thromboembolism for their risk of recurrence: extended low-dose Apixaban given only to patients with positive D-dimer results: The Apidulcis study. Bleeding Thromb Vascul Biol [Internet]. 2022 Mar. 22 [cited 2025 Jun. 27];1(1). Available from: https://www.btvb.org/btvb/article/view/10