From the Gillette Children's Hospital, Saint Paul, MN (Dr. Georgiadis, Dr. Nahm, and Dr. Dahl), and the Department of Orthopedic Surgery, University of Minnesota, Minneapolis, MN (Dr. Georgiadis, Dr. Nahm, and Dr. Dahl).

Dr. Dahl or an immediate family member serves as a paid consultant to NuVasive, Orthofix, and Stryker Trauma. None of the following authors or any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article: Dr. Georgiadis and Dr. Nahm.

We obtained permission from Taylor Simpson of Periscope Studios to use the images in Figures 1 and 2, and we have the formal documentation on file, if requested.