1 Division of Pulmonary and Critical Care Medicine, University of Texas Southwestern Medical Center, Dallas, TX; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, TX. Electronic address: andrew.tomlinson@utsouthwestern.edu.
2 Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, TX; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, TX.
3 Division of Pulmonary and Critical Care Medicine, University of Texas Southwestern Medical Center, Dallas, TX; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, TX.