[1] McMaster Univ, Dept Med, Hamilton, ON, Canada
[2] Thrombosis & Atherosclerosis Res Inst, Hamilton, ON, Canada
[3] Karolinska Univ Hosp, Dept Hematol, Stockholm, Sweden
[4] Sahlgrens Univ Hosp, Dept Med, Gothenburg, Sweden
[5] Thrombosis Res Inst, London, England
[6] UCL, London WC1E 6BT, England
[7] Municipal Hosp Friedrichstadt, Med Div 2, Dresden, Germany
[8] Boehringer Ingelheim GmbH & Co KG, Clin Res, Alkmaar, Netherlands
[9] Boehringer Ingelheim GmbH & Co KG, Clin Res, Asker, Norway
[10] Boehringer Ingelheim GmbH & Co KG, Ridgefield, CT USA
[11] Bellevue Hosp, Dept Vasc Pathol, St Etienne, France
[12] Brigham & Womens Hosp, Boston, MA 02115 USA
[13] Harvard Univ, Sch Med, Boston, MA USA