1. Department of Pediatrics, Children’s Mercy Hospital, Kansas City, Missouri;
2. School of Medicine, University of Missouri–Kansas City, Kansas City, Missouri;
3. Icon plc, Dublin, Ireland;
4. Division of Health Services and Outcomes Research and
5. Department of Pediatrics, St Louis Children’s Hospital and School of Medicine, Washington University, St Louis, Missouri;
6. Department of Pediatrics, University of Washington and Seattle Children’s Hospital, Seattle, Washington;
7. Department of Pediatrics, East Carolina University, Greenville, North Carolina; and
8. Department of Pediatrics, Children’s Hospital of San Antonio, San Antonio, Texas