1 Department of Medicine, Division of Cardiology, Columbia University Irving Medical Center, New York, New York, USA. Electronic address: sra2180@cumc.columbia.edu.
2 Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern, Dallas, Texas, USA; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain. Electronic address: Hesham.sadek@utsouthwestern.edu.