1. Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, Maryland.
2. Neurotraumatology and Neurosurgery Research Unit, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.
3. Department of Neurosurgery, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.
4. Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland.
5. Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland.