1. Pediatrics and Emergency Medicine, Children’s National Health System, The George Washington University, Washington, DC;
2. Department of Pediatrics, The Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania;
3. Department of Pediatrics, University of Utah, Salt Lake City, Utah;
4. James M. Anderson Center for Health Systems Excellence, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio;
5. Department of Pediatrics, University of Colorado, Children’s Hospital, Boulder, Colorado; and
6. Ann and Robert H. Lurie Children’s Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, Illinois