1. Division of Pulmonary Sciences and Critical Care Medicine,
2. Division of Pulmonary, Critical Care and Sleep Medicine, National Jewish Health, Denver, Colorado;
3. Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado;
4. Department of Sport Science, University of Innsbruck, Innsbruck, Austria;
5. Institute of Mountain Emergency Medicine, EURAC Research, Bolzano, Italy;
6. Department of Bioengineering, and
7. Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, Texas;
8. Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas, Texas;
9. Department of Physiology, University of Oregon, Eugene, Oregon; and
10. Department of Physiology, University of Colorado, Colorado Springs, Colorado
11. Division of Cardiology,
12. Clinical Translational Research Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado;