1. Division of Cardiology, University of Southern California, Los Angeles (P.K.G.).
2. Division of Biostatistics, School of Public Health (W.G.), University of Minnesota, Minneapolis.
3. Department of Laboratory Medicine and Pathology (A.B.K., B.T.S., M.Y.T.), University of Minnesota, Minneapolis.
4. Division of Cardiology, Emory University School of Medicine, Atlanta, GA (W.O.).
5. Department of Epidemiology, University of Washington, Seattle (S.R.H.).
6. Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD (E.D.M.).