Complete compression ultrasonography of the leg veins as a single test for the diagnosis of deep vein thrombosis - Schellong, SM; Schwarz, T; Halbritter, K; Beyer, J; Siegert, G; Oettler, W (Thromb Haemost, 2003)
PubMed PMID: 12574800. Epub 2003/02/08. eng.