Funding for this research was provided by:
Scoliosis Research Society
Received: 22 July 2020
Accepted: 17 November 2020
First Online: 8 December 2020
Ethics approval and consent to participate
: This study was approved by the medical ethics review board of The Children’s Hospital of Philadelphia. Consent was not required by the institution ethical committee for this retrospective study.
: Identifiable patient information are not included in the study thus consent for publication is not applicable.
: No competing interest to report.