Washington University in St. Louis - Department of Neurosurgery, Vanderbilt University - Department of Neurological Surgery, Dayton Children's Hospital - Department of Neurological Surgery, Washington University in St. Louis - Department of Neurosurgery, Vanderbilt University - Department of Neurological Surgery, Indiana University School of Medicine - Department of Neurological Surgery, Indiana University - Department of Neurological Surgery, Washington University in St. Louis - Department of Medicine, Washington University in St. Louis - Department of Medicine, Washington University School of Medicine in St. Louis - Department of Emergency Medicine, Washington University School of Medicine in St. Louis - Department of Surgery, Washington University School of Medicine in St. Louis - Becker Medical Library, Indiana University - Department of Neurological Surgery, Johns Hopkins University - Department of Anesthesiology, Johns Hopkins University - Department of Neurosurgery, Oregon Health and Science University - Department of Pediatrics, Oregon Health and Science University - Department of Neurological Surgery, Oregon Health and Science University - Department of Neurological Surgery, Dayton Children's Hospital - Department of Neurological Surgery, Vanderbilt University - Department of Neurological Surgery, University of California, Davis - Department of Emergency Medicine and Washington University in St. Louis - Department of Neurosurgery

University of Missouri, University of Missouri, University of Missouri, University of Missouri, University of Missouri, University of Missouri and Washington University in St. Louis - Department of Medicine

Washington University in St. Louis - Department of Medicine, Ohio State University (OSU), Ohio State University (OSU), affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and Washington University in St. Louis - Division of Public Health Sciences