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