1. From the Departments of Molecular Cell Biology (M.W.J.S., P.L.H.) and Plasma Proteins (M.J.M.), Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands; and Department of Pathology and Cardiac Surgery, ICaR-VU (H.W.M.N.) and Department of Physiology (P.L.H.), VU University Medical Center, Amsterdam, The Netherlands.