1 Non-Invasive Cardiovascular Imaging Program, Departments of Medicine (Cardiovascular Division) and Radiology, Brigham and Women's Hospital, 75 Francis St, Boston, MA, 02115, USA. rblankstein@partners.org.
2 Harvard Medical School, Boston, MA, USA. rblankstein@partners.org.
3 Section of Cardiovascular Medicine, Departments of Medicine and Radiology, Yale University School of Medicine, New Haven, CT, USA.