1. Center for Hyperbaric Medicine and Environmental Physiology, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina.
2. Center for Aging, Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina.
3. Department of Pathology, Christchurch School of Medicine and Health Sciences, University of Otago, Christchurch, New Zealand.
4. U.S. Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Natick, Massachusetts.
5. School of Medicine, Duke University Medical Center, Durham, North Carolina.