1. Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA
2. Department of Emergency Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
3. Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
4. University of California, Davis School of Medicine, Sacramento, CA, USA
5. Department of Emergency Medicine, College of Medicine, University of Florida, Gainesville, FL, USA