1. aDivision of Hospital Medicine, University of Southern California, Los Angeles, California
2. bChildren’s Hospital Los Angeles, Los Angeles, California
3. cDepartment of Pediatrics, University of Wisconsin, Madison, Wisconsin
4. dDepartment of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma
5. eChildren’s Hospital of Richmond at Virginia Commonwealth University, Richmond, Virginia
6. fConnecticut Children’s Medical Center, Hartford, Connecticut
7. gDepartment of Pediatrics, Washington University in St Louis, St Louis, Missouri
8. hLe Bonheur Children’s Hospital, Memphis, Tennessee
9. iCincinnati Children’s Hospital, Cincinnati, Ohio
10. jJohns Hopkins All Children’s Hospital, St Petersburg, Florida