Exclusion of deep venous thrombosis with D-dimer testing. Comparison of 13 D-dimer methods in 99 outpatients suspected of deep venous thrombosis using venography as reference method - van der Graaf, F; van den Borne, H; van der Kolk, M; de Wild, PJ; Janssen, GW; van Uum, SH (Thromb Haemost, 2000)