[1] Harvard Med Sch, Dept Neurol, Boston, MA USA
[2] Massachusetts Gen Hosp, Stephen E & Catherine Pappas Ctr Neurooncol, Yawkey 9E,55 Fruit St, Boston, MA 02114 USA
[3] Dana Farber Harvard Canc Ctr, Neurooncol Program, Boston, MA USA
[4] Heidelberg Univ, Dept Neurol & Neurooncol, Neurol Clin, Med Ctr, Heidelberg, Germany
[5] German Canc Res Ctr, Clin Cooperat Unit Neurooncol, Heidelberg, Germany