1. Department of Emergency Medicine, University of California San Francisco, San Francisco
2. Department of Neurology, University of California San Francisco, San Francisco
3. Department of Neurological Surgery, University of Washington, Seattle
4. Department of Biostatistics, University of Washington, Seattle
5. Brain and Spinal Injury Center, Zuckerberg San Francisco General Hospital, San Francisco, California
6. Department of Emergency Medicine, University of Cincinnati, Cincinnati, Ohio
7. Department of Neurological Surgery, University of California San Francisco, San Francisco
8. for the TRACK-TBI Investigators