1 Cardiovascular Imaging Program, Departments of Medicine and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts. Electronic address: rblankstein@partners.org.
2 Division of Internal Medicine, University Hospital and State of São Paulo Cancer Institute (ICESP), University of São Paulo, São Paulo, Brazil; Preventive Medicine Center Hospital Israelita Albert Einstein and School of Medicine, Faculdade Israelita de Ciência da Saúde Albert Einstein, São Paulo, Brazil.
3 Brigham and Women's Hospital Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts.