1. Traumatic Brain Injury Laboratory, Department of Neurosurgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
2. Department of Neurosurgery, Erasmus Medical Center, Rotterdam, The Netherlands.
3. Philadelphia Veterans Affairs Medical Center, Philadelphia, Pennsylvania.
4. Program in Developmental and Regenerative Cell Biology, The Burnham Institute, La Jolla, California.
5. The Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
6. Center for Gene Therapy, Tulane University Health Sciences Center, New Orleans, Louisiana.