1. Department of Neurosurgery, Washington University School of Medicine in St Louis, St Louis, Missouri
2. Department of Surgery, Washington University School of Medicine in St Louis, St Louis, Missouri
3. Division of Emergency Medicine, Department of Neurology, Washington University School of Medicine in St Louis, St Louis, Missouri
4. Department of Pediatrics, Washington University School of Medicine in St Louis, St Louis, Missouri
5. Division of Emergency Medicine, Department of Neurology, Washington University School of Medicine in St Louis, St Louis, Missouri4Department of Pediatrics, Washington University School of Medicine in St Louis, St Louis, Missouri
6. Department of Surgery, Washington University School of Medicine in St Louis, St Louis, Missouri5Alvin J Siteman Cancer Center, Washington University School of Medicine in St Louis, St Louis, Missouri6Prevention Research Center, Washington University School of Medicine in St Louis, St Louis, Missouri