1. Medical Student, Department of Anesthesiology, Center for Hyperbaric Medicine and Environmental Physiology.
2. Professor, Department of Medicine, and Director, Center for Hyperbaric Medicine and Environmental Physiology.
3. Research Scientist, Department of Physics, Center for Hyperbaric Medicine and Environmental Physiology.
4. Professor of Anesthesiology, Associate Professor of Medicine, and Medical Director, Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center.