1. Perelman School of Medicine Philadelphia Pennsylvania USA
2. Department of Pediatrics Children's Hospital of Philadelphia (CHOP) Philadelphia Pennsylvania USA
3. Division of Emergency Medicine Children's Hospital of Philadelphia (CHOP) Philadelphia Pennsylvania USA
4. Harvard Medical School Boston Massachusetts USA
5. Department of Pediatrics Boston Children's Hospital Boston Massachusetts USA
6. Division of Emergency Medicine Boston Children's Hospital Boston Massachusetts USA
7. Department of Emergency Medicine Hospital of the University of Pennsylvania (HUP) Philadelphia Pennsylvania USA