1. Division of Emergency Medicine, Department of Surgery, Duke University, Durham, North Carolina
2. Division of Neurosurgery and Neurology, Department of Neurosurgery, Duke University, Durham, North Carolina
3. Department of Emergency Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
4. State University of Maringá, Maringá, Brazil
5. UniCesumar, Maringa, Brazil
6. Duke Global Health Institute, Duke University, Durham, North Carolina
7. IC-FUC, Porto Alegre, Brazil
8. Duke School of Medicine, Duke University, Durham, North Carolina