1. From the Centre for Vascular Research, Department of Pathology, University of New South Wales, and Department of Haematology, The Prince of Wales Hospital (F.S.S., H.I., R.B. C.N.C., L.M.K.), Sydney, NSW, Australia; Centre for Cardiovascular Biology and Medicine, BHF Laboratories, Department of Medicine, University College London (S.S., R.K., M.J.R., J.F.M., I.C.Z.), United Kingdom; Cell Biology Laboratory (P.K., A.B.), Baker Heart Research Institute, Australia.