Marcelo F Di Carli1,2,3,4. 1. Cardiovascular Imaging Program, Departments of Radiology and Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, USA. mdicarli@bwh.harvard.edu. 2. Division of Nuclear Medicine and Cardiovascular Imaging, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, USA. mdicarli@bwh.harvard.edu. 3. Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, USA. mdicarli@bwh.harvard.edu. 4. Brigham and Women's Hospital, 75 Francis St, ASB-L1 Room 037-C, Boston, MA, 02115, USA. mdicarli@bwh.harvard.edu.