1 Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, Texas; Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas. Electronic address: benjaminlevine@texashealth.org.
2 Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, Texas; Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas.
3 Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas.