1. Department of Neurology/Neurosurgery, Johns Hopkins School of Medicine, Baltimore, Maryland.
2. Center for Surgical Trials and Outcomes Research (CSTOR), Johns Hopkins University, Baltimore, Maryland.
3. University of Rochester, School of Medicine and Dentistry, Rochester, New York.
4. Department of Community-Public Health, Johns Hopkins University School of Nursing, Baltimore, Maryland.
5. Center for Injury Research and Policy, Johns Hopkins University, Baltimore, Maryland.
6. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
7. Department of Surgery, Division of Acute Care Surgery and Adult Trauma, Johns Hopkins School of Medicine, Baltimore, Maryland.