1. Neurovascular Physiology Laboratory, School of Kinesiology, Auburn University, Auburn, Alabama
2. Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware
3. Division of Geriatric Medicine, University of Colorado-Anschutz Medical Campus, Aurora, Colorado
4. Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
5. War Related Illness and Injury Study Center, Washington DC Department of Veteran Affairs Medical Center, Washington, District of Columbia
6. Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama