Traumatic brain injury(TBI)and spinal cord injury(SCI)are leading causes of death and disability worldwide(Center for Disease Control,2006).Both injuries are induced by external traumatic event and likely happen together.After the primary traumatic incident,the secondary injury,including ischemic,inflammatory,metabolic and biochemical cascades,is likely more devastating(Blumbergs,1997).To date,all clinical trials have failed to cure TBI and SCI,due to
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