[1] Massachusetts Gen Hosp, Ctr Canc, Stephen E & Catherine Pappas Ctr Neurooncol, Dept Neurol, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Dept Radiat Oncol, Div Hematol & Oncol, Boston, MA 02114 USA
[3] Johns Hopkins Univ Hosp, Dept Oncol, Baltimore, MD 21287 USA
[4] Henry Ford Hosp, Dept Neurosurg, Detroit, MI 48202 USA
[5] Wake Forest Univ, Med Ctr, Dept Med, Winston Salem, NC 27103 USA