1. Department of Anesthesiology, Emory University Hospital, 1364 Clifton Road NE, Atlanta GA 30322.
2. The Johns Hopkins Hospital Department of Neuroscience Nursing, 600N Wolfe Street, Baltimore MD 21287.
3. Department of Neurology, University of Maryland Medical Systems, 22S Greene Street, G7K55, Baltimore MD 21201.
4. Department of Emergency Medicine, University of Maryland Medical Systems, 22S Greene Street, G7K55, Baltimore MD 21201.
5. Department of Neurology, San Antonio Military Medical, Center, 3551 Roger Brooke Drive, San Antonio TX 78219.
6. Department of Trauma Critical Care, San Antonio Military Medical Center, 3551 Roger Brooke Drive, San Antonio TX 78219.
7. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 600N Wolfe Street, Baltimore MD 21287.
8. Department of Neurosurgery, Johns Hopkins University School of Medicine, 600N Wolfe Street, Baltimore MD 21287.
9. Department of Neurology, Johns Hopkins University School of Medicine, 600N Wolfe Street, Baltimore MD 21287.