A new computerized impedance plethysmograph: accuracy in the detection of proximal deep-vein thrombosis in symptomatic outpatients - Prandoni, P; Lensing, A WA; Huisman, M V; Jonker, J JC; Vigo, M; Borm, J JJ; Büller, H R; Sing, A K; Carta, M; ten Cate, J W (Thromb Haemostas, 1991)