1 VCU Pauley Heart Center, Division of Cardiology, Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA, USA.
2 Department of Cardiovascular Disease, John Ochsner Heart and Vascular Institute, Ochsner Clinical School, the University of Queensland School of Medicine, 1514 Jefferson Highway, New Orleans, LA 70121-2483, USA. Electronic address: clavie@ochsner.org.
3 Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, Canada.