1 Mallinckrodt Institute of Radiology, Division of Nuclear Medicine, Cardiovascular Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD, USA; Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA. Electronic address: thschindler@wustl.edu.
2 Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD, USA.
3 Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA.