1 Department of Cardiovascular Diseases, John Ochsner Heart & Vascular Institute, Ochsner Clinical School-The University of Queensland School of Medicine, New Orleans, Louisiana. Electronic address: clavie@ochsner.org.
2 Department of Physical Therapy, Department of Kinesiology and Nutrition and Integrative Physiology Laboratory, College of Applied Science, University of Illinois at Chicago, Chicago, Illinois.
3 Department of Cardiovascular Medicine, William Beaumont Hospital, Royal Oak, Michigan.