1. Center for Surgical Outcomes Research, The Research Institute at Nationwide Children’s Hospital, Columbus, OH, USA
2. Department of Pediatric Surgery, Nationwide Children’s Hospital, Columbus, OH, USA
3. Center for Pediatric Trauma Research, The Research Institute at Nationwide Children’s Hospital, Columbus, OH, USA
4. Department of Pediatric Surgery, Children’s Mercy Hospitals and Clinics, Kansas City, MO, USA
5. Department of Pediatric Surgery, Johns Hopkins Children’s Center, Baltimore, MD, USA
6. Division Trauma and Burn Surgery, Center for Surgical Care, Children’s National Medical Center, Washington, DC, USA
7. Department of Pediatric Surgery, Children’s Hospital of Michigan, Detroit Medical Center, Detroit, MI, USA