1. Department of Neurosurgery, University of Maryland, Baltimore, Maryland, USA.
2. Department of Epidemiology and Public Health, Division of Biostatistics and Bioinformatics, R. Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland, USA.
3. Department of Diagnostic Radiology and Nuclear Medicine, R. Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland, USA.
4. Department of Physiology, University of Maryland, Baltimore, Maryland, USA.
5. Program in Trauma, R. Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland, USA.