Funding for this research was provided by:
Agency for Healthcare Research and Quality (1R01 HS24263-01)
Received: 18 March 2019
Accepted: 20 August 2019
First Online: 23 September 2019
Ethics approval and consent to participate
: All the patient data used in this study are from National Trauma Data Bank, which are public available and de-identified. The need for approval was waived by the Nationwide Children’s Hospital Institutional Review Board.
: All authors consented for this publication.
: The authors declare that they have no competing interests.