1. aDepartment of Pediatrics, School of Medicine, University of California San Francisco, San Francisco, California
2. bDepartment of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
3. cBoston Medical Center/Boston University School of Medicine, Deparment of Pediatrics, Boston, Massachusetts
4. dDepartment of Pediatrics, NYU Grossman School of Medicine, New York, New York
5. eDepartments of Emergency Medicine and Pediatrics, School of Medicine, University of California, Davis School of Medicine, Sacramento, California
6. fDepartment of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, Colorado
7. gAmerican Academy of Pediatrics, Itasca, Illinois
8. hDepartment of Pediatrics, Children’s Hospital at Erlanger and College of Medicine, The University of Tennessee at Chattanooga, Chattanooga, Tennessee