1. From the Immunology Research Division (C.B., C.E.C., A.H.L.) and the Vascular Research Division (G.S., A.H.L.), Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Mass; and the J. Alick Little Lipid Research Laboratory, St Michael’s Hospital, and the Departments of Laboratory Medicine and Pathobiology, Biochemistry, and Medicine (G.F.M., P.W.C.), University of Toronto, Toronto, Canada.