title: Postoperative deep venous thrombosis: comparison of diagnostic techniques.
mesh_terms: D004452:Echocardiography; D005340:Fibrinogen; D006801:Humans; D007457:Iodine Radioisotopes; D011183:Postoperative Complications; D013924:Thrombophlebitis / Q000175:diagnosis*; D014463:Ultrasonography
chemical_list: D007457:Iodine Radioisotopes; D005340:Fibrinogen