1. How do we know who has had deep vein thrombosis?;Sandler, D.A.; Mitchell, J.R.A.;PosIgrad M'edJ,1989
2. Leg phlebography: the incidence, nature and modification of undesirable side effects;Bettmann, M.A.; Paulin, S.;Radiologv,1977
3. Roentgen diagnosis of venous thrombosis in the leg;Rabinov, K.; Paulin, S.;Arch Surg,1972
4. Detcction of deep-vein thrombosis by real-time B-mode ultrasonography;Lensing, A.W.A.; Prandoni, P.; Brandjes, D.;N Engl j Med,1989