作者单位:San Diego Center for Spinal Disorders, 4130 La Jolla Village Dr, San Diego, CA 92037, United States[1]Department of Orthopaedics, Faculty of Medicine, Hacettepe University, Ankara, Turkey[2]Department of Orthopaedic Surgery, Children's Hospital, Harvard Medical School, Boston, MA, United[3]Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, United States[4]