1. Center for Advanced Imaging Research, Department of Diagnostic Radiology & Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
2. National Intrepid Center of Excellence, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
3. Department of Epidemiology & Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
4. Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland, USA
5. Program in Trauma, Department of Neurology, University of Maryland School of Medicine, Baltimore, Maryland, USA