[1] Mayo Clin, Dept Neurol & Hematol Oncol, Canc Ctr, Phoenix, AZ USA
[2] Thomas Jefferson Univ, Dept Radiat Oncol, Philadelphia, PA USA
[3] Columbia Univ, Div Neurooncol, New York Presbyterian, Med Ctr, New York, NY USA
[4] Ohio State Univ, James Canc Hosp, Dept Radiat Oncol, Wexner Med Ctr, Columbus, OH USA
[5] Cleveland Clin, Taussig Canc Inst, Dept Radiat Oncol, Cleveland, OH USA
[6] Univ Duisburg Essen, Univ Hosp Essen, Div Clin Neurooncol, Dept Neurol,West German Canc Ctr WTZ, Essen, Germany
[7] German Canc Consortium, Partner Site, Essen, Germany