Diagnosis of phlebothrombosis using color-coded duplex sonography. A prospective comparison with phlebography - Becker, D; Gunter, E; Cidlinsky, K; Marienhagen, J; Kellermann, W; Voss, E; Schneider, MU; Schweiger, H; Hahn, EG; Heyder, N (Dtsch Med Wschr, 1994)