1. Department of Neuroradiology, Swedish Medical Center, Injury Outcomes Network (ION) Research, Englewood, CO 80113, USA
2. Department of Epidemiology, Injury Outcomes Network (ION) Research, Englewood, CO 80113, USA
3. Department of Neurology, Swedish Medical Center, Injury Outcomes Network (ION) Research, Englewood, CO 80113, USA
4. Department of Basic Science, Injury Outcomes Network (ION) Research, Englewood, CO 80113, USA
5. Department of Directors, Injury Outcomes Network (ION) Research, Englewood, CO 80113, USA