1. Center for Surgical Outcomes Research, The Research Institute at Nationwide Children’s Hospital, 700 Children’s Drive, Columbus, OH 43205, USA
2. Department of Pediatric Surgery, Nationwide Children’s Hospital, Columbus, Ohio, 43205, USA
3. Center for Pediatric Trauma Research, The Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, 43205, USA
4. Department of Pediatric Surgery, Children’s Mercy Hospitals and Clinics, Kansas City, Missouri, USA
5. Department of Pediatric Surgery, Johns Hopkins Children’s Center, 1800 Orleans Street, Baltimore, Maryland, 21287, USA
6. Division Trauma and Burn Surgery, Children’s National Hospital, Washington, District of Columbia, USA
7. Department of Pediatric Surgery, Children’s Hospital of Michigan, Detroit Medical Center, Detroit, Michigan, USA