Residual vein thrombosis to establish duration of anticoagulation after a first episode of deep vein thrombosis: the Duration of Anticoagulation based on Compression UltraSonography (DACUS) study by Sergio Siragusa, Alessandra Malato, Raffaela Anastasio, Valeria Cigna, Glauco Milio, Corrado Amato, Mario Bellisi, Maria Teresa Attanzio, Oreste Cormaci, Massimo Pellegrino, Alberto Dolce, Alessandra Casuccio, Guido Bajardi, and Guglielmo Mariani Blood Volume 112(3):511-515 August 1, 2008 ©2008 by American Society of Hematology Evaluation of residual vein thrombosis. Sergio Siragusa et al. Blood 2008;112:511-515 ©2008 by American Society of Hematology Study design. Sergio Siragusa et al. Blood 2008;112:511-515 ©2008 by American Society of Hematology Kaplan-Meier curve for recurrent VTE in the 3 groups. Sergio Siragusa et al. Blood 2008;112:511-515 ©2008 by American Society of Hematology