[1] Johns Hopkins Univ Sch Med, Dept Neurosurg, Baltimore, MD 21287 USA
[2] Long Isl Jewish Med Ctr, Zucker Sch Med Hofstra, Dept Neurosurg, Manhasset, NY 11030 USA
[3] North Shore Univ Hosp, Northwell Hlth, Manhasset, NY 11030 USA
[4] Rush Univ, Sch Med, Dept Orthopaed Surg, Chicago, IL USA
[5] Duke Univ Med Ctr, Dept Neurosurg, Durham, NC 27710 USA
[6] NYU Grossman Sch Med, Dept Neurosurg, New York, NY 10016 USA
[7] Atrium Musculoskeletal Inst, Levine Canc Inst, Atrium Hlth, Carolinas Med Ctr,Dept Orthopaed Surg, Charlotte, NC 28204 USA
[8] Johns Hopkins Univ Sch Med, Dept Radiat Oncol, Baltimore, MD 21287 USA
[9] Massachusetts Gen Hosp, Harvard Med Sch, Dept Hematol & Oncol, Boston, MA 02114 USA
[10] Massachusetts Gen Hosp, Harvard Med Sch, Dept Neurosurg, Boston, MA 02114 USA
[11] Massachusetts Gen Hosp, Harvard Med Sch, Dept Orthopaed Surg, Orthopaed Oncol Serv, Boston, MA 02114 USA
[12] Brigham & Womens Hosp, Harvard Med Sch, Dept Orthopaed Surg, Boston, MA 02115 USA