title: Site of origin of venous thrombi.
mesh_terms: D005340:Fibrinogen; D006801:Humans; D007866:Leg / Q000098:blood supply*; D008722:Methods; D011868:Radioisotopes; D013924:Thrombophlebitis / Q000175:diagnosis*; D013927:Thrombosis / Q000175:diagnosis
chemical_list: D011868:Radioisotopes; D005340:Fibrinogen