作者单位:Univ Med Ctr Hamburg Eppendorf, Dept Neurosurg, Hamburg, Germany[1]Mem Sloan Kettering Canc Ctr, Dept Neurosurg, 1275 York Ave, New York, NY 10021 USA[2]Univ New Mexico, Dept Neurosurg, Ctr Comprehens Canc, Albuquerque, NM 87131 USA[3]Penn State Univ, Milton S Hershey Med Ctr, Dept Neurosurg, Hershey, PA 17033 USA[4]