1. VA Portland Health Care System, Portland, OR
2. Department of Neurology, Oregon Health and Science University, Portland, OR
3. Department of Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
4. Department of Anesthesiology, Joseph Stokes Research Institute, Children’s Hospital of Philadelphia, Philadelphia, PA
5. Department of Behavioral Neuroscience and Pathology, Oregon Health and Science University, Portland, OR
6. Department of Medicine and Behavioral Neuroscience, Oregon Institute of Occupational Health Sciences, Oregon Health and Science University, Portland, OR