1 Cardiovascular Division (Department of Medicine), Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA. Electronic address: rblankstein@bwh.harvard.edu.
2 University of Arizona, Phoenix, Arizona, USA.
3 Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio, USA.
4 Department of Cardiology, Deborah Heart and Lung Center, Browns Mills, New Jersey, USA.
5 Cardiovascular Division (Department of Medicine), Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.
6 Icahn School of Medicine at Mount Sinai, New York, New York, USA.