Strategies for the safe and effective exclusion and diagnosis of deep vein thrombosis by the sequential use of clinical score, D-dimer testing and compression ultrasonography - Michiels,J.J.; Freyburger,G.; van der Graaf,F.; Janssen,M.CH.; Oortwijn,W.; van Beek,E.JR. (Semin Thromb Hemost, 2000)