1. Lipid Research Laboratory, Hanson Institute, Adelaide, South Australia, Australia 5000, University of Adelaide, Department of Medicine, Royal Adelaide Hospital, South Australia, Australia 5000, Department of Immunology, The Scripps Research Institute, La Jolla, California 92037, and Centre for Thrombosis and Vascular Research, School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia 2050