1. From the Division of Nuclear Medicine (P.E.B., R.L., D.P.H., R.F.D., F.M.B.) and Division of Cardiology (D.C., S.D.R.), Johns Hopkins University, Baltimore, MD; Division of Cardiology, University of Washington, Seattle (P.E.B.); Heart Center and Turku PET Centre, Turku University Hospital, Turku, Finland (R.L.); Department of Nuclear Medicine, Technical University of Munich, Munich, Germany (S.G.N.); and Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany (F.M.B.).