1 Washington University in St Louis, Mallinckrodt Institute of Radiology, Division of Nuclear Medicine, St Louis, Missouri, USA; Washington University in St Louis School of Medicine, John T. Milliken Department of Internal Medicine, Cardiovascular Division, St Louis, Missouri, USA. Electronic address: [email protected].
2 Washington University in St Louis School of Medicine, John T. Milliken Department of Internal Medicine, Cardiovascular Division, St Louis, Missouri, USA.