1 Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
2 Department of Internal Medicine, Icahn School of Medicine at Mount Sinai/Mount Sinai St. Luke's West Hospital, New York, NY, USA.
3 Cardiac Rehabilitation and Preventive Cardiology, John Ochsner Heart and Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine, New Orleans, LA, USA.
4 Division of Cardiovascular Medicine, University of California, Los Angeles, Los Angeles, CA, USA.