作者单位:Department of Neurologic Surgery, Mayo Clinic, Gonda 8-214 South, Rochester, MN 55905, United States[1]Children's Hospital, Pediatric Neurosurgery, Birmingham, AL, United States[2]Department of Neurologic Surgery, Mayo Clinic, Gonda 8-214 South, Rochester, MN 55905, United[3]Department of Orthopedics, Mayo Clinic, Rochester, MN, United States[4]