1. From the Thrombosis and Haemostasis Laboratory (J.A.R., Y.-P.W., E.H.J., M.J.W.I., G.v.W., P.G.d.G., J.J.S.), Department of Haematology, University Medical Center Utrecht, the Netherlands, and Laboratoire de Pathologie Cellulaire de L’Hémostase (A.T.N., P.N.), UMR 5533 CNRS, Hôpital Cardiologique, Pessac, France.