Received: 26 August 2019
Revised: 21 October 2019
Accepted: 28 November 2019
First Online: 4 December 2019
Change Date: 28 January 2020
Change Type: Correction
Change Details: Unfortunately, the names of the members of the Texas Children’s Hospital Spine Study Group have not been mentioned in the published article.
Compliance with ethical standards
: B. Dahl and M. Gehrchen have received institutional grants from K2M and Medtronic. J. Heydemann is a comitee member of POSNA, AACPDM and SRS and shareholder in Merck, Sanofi Avanti and Orthopediatrics, unrelated to this work. L. Deveza is a shareholder in Lento Medical Inc. and has received research funding from OREF (Orthopedic Research an Education Fund), unrelated to this work. C. Dragsted, S. Ohrt-Nissen, M. Jain, D. Liu and S. Fruergaard have no conflicts of interest.