1. From the Department of Medicine, University of California, San Diego. Present affiliations: Division of Cardiovascular and Respiratory Medicine (T.Y.), Kobe University School of Medicine, Kobe, Japan; Department of Immunology (S.F.), The Scripps Research Institute, La Jolla, Calif; and Department of General Pathology and Excellence Research Center on Cardiovascular Diseases (C.N.), 1st School of Medicine, Second University of Naples, Naples, Italy.