Affiliation: | (1) Department of Orthopedic Surgery, Shriners Hospitals for Children-Philadelphia, 3551 North Broad Street, Philadelphia, PA 19140, USA;(2) Department of Neurosurgery, Baylor College of Medicine, 1709 Dryden Suite 750, Houston, TX 77030, USA;(3) Department of Orthopedic Surgery, Rady Children’s Hospital and Health Center, 3020 Children’s Way MC 5101, San Diego, CA 92123, USA |