1. From the Department of Medicine and Radiology, Weill Medical College of Cornell University, The New York Presbyterian Hospital, New York, NY; the Departments of Imaging (Division of Nuclear Medicine), Department of Medicine (Division of Cardiology), and CSMC Burns & Allen Research Institute, Cedars-Sinai Medical Center, Los Angeles, Calif; and the Department of Medicine, University of California at Los Angeles, School of Medicine, Los Angeles, Calif.