Palareti, Gualtiero, et al. “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, Thrombosis and Vascular Biology, vol. 1, no. 1, Mar. 2022, doi:10.4081/btvb.2022.10.