[1] Oxford Univ Hosp, Oxford Spine Serv, Oxford, England
[2] Univ British Columbia, Combined Neurosurg & Orthopaed Spine Program, Vancouver, BC, Canada
[3] Univ Toronto, Orthoped Residency Program, Toronto, ON, Canada
[4] Univ N Carolina, Dept Neurosurg, Chapel Hill, NC USA
[5] Johns Hopkins Univ, Dept Neurosurg, Sch Med, Baltimore, MD USA
[6] Mem Sloan Kettering Canc Ctr, Dept Neurosurg, New York, NY USA
[7] MD Anderson Canc Ctr, Orthopaed Oncol, Houston, TX USA
[8] Rhode Isl Hosp, Norman Prince Neurosci Inst, Providence, RI USA
[9] IRCCS Ist Ortoped Rizzoli, Oncol & Degenerat Spine Surger, Bologna, Italy
[10] Natl Ctr Spinal Disorders, Dept Spinal Surg, Budapest, Hungary
[11] Sunnybrook Hlth Sci Ctr, Dept Radiat Oncol, Toronto, ON, Canada
[12] Univ Med Ctr Utrecht, Dept Orthoped, Utrecht, Netherlands
[13] NYU, Dept Neurosurg, Langone Hlth, New York, NY USA