1. From the Laboratory of Experimental Internal Medicine (R.R., S.W., A.F.d.V., J.M.P., T.v.d.P.), Departments of Vascular Medicine (J.C.M., M.L.) and Infectious Diseases (T.v.d.P.), Tropical Medicine & AIDS, Academic Medical Center, University of Amsterdam; and the Sanquin Research at the CLB (C.E.H.), Amsterdam, The Netherlands.