1. From the Division of Cardiovascular Medicine (J.H.F.R.), Cambridge University, UK; Department of Cardiology and Nuclear Medicine (F.H.), Bichat Hospital, Assistance Publique-Hopitaux de Paris and Institut National de la Santé et de la Recherche Medicalé U698, Paris, France; and Translational and Molecular Imaging Institute (Z.A.F.), Mount Sinai School of Medicine, New York, New York.