1. Traumatic Brain Injury Laboratory, Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania.
2. Current address: Biobehavioral Nursing and Health Systems, University of Washington, Seattle, Washington.
3. Current address: Department of Anatomy & Neurobiology, Medical College of Virginia Campus of Virginia Commonwealth University, Richmond, VA.
4. The Veterans Administration Medical Center, Philadelphia, Pennsylvania.
5. Current address: Department of Neurosurgery, University Hospital, Uppsala, Sweden
6. Academic Unit of Neuropathology, University of Glasgow, Scotland, United Kingdom.
7. Division of Neurosurgery, Departments of Surgery and of Molecular and Medical Pharmacology, UCLA Brain Injury Research Center, University of California, Los Angeles, California.