1. From the Central Laboratory of the Netherlands Red Cross Blood Transfusion Service (M.C.M., C.E.H.), Laboratory for Clinical and Experimental Immunology, Amsterdam; the Center for Hemostasis, Thrombosis, Atherosclerosis, and Inflammation Research (M.C.M., M.E.W., N.S., J.J.P.K., H.t.C.), Academic Medical Center, University of Amsterdam, Amsterdam; and the Department of Internal Medicine (H.t.C.), Slotervaart Hospital, Amsterdam, the Netherlands.