1. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland, United States
2. Child Life Department, Johns Hopkins Hospital, Baltimore, Maryland, United States
3. Department of Radiology, Children's National Hospital, Washington, District of Columbia, United States
4. Departments of Radiology and Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, United States
5. Department of Pediatrics, Division of Hematology, Johns Hopkins School of Medicine, Baltimore, Maryland, United States
6. Department of Neurology, Division of Pediatric Neurology, Johns Hopkins School of Medicine, Baltimore, Maryland, United States
7. Department of Neurosurgery, Division of Pediatric Neurosurgery, Johns Hopkins School of Medicine, Baltimore, Maryland, United States