[1] Univ Lausanne Hosp, Dept Neurosurg, Lab Tumor Biol & Genet, Lausanne, Switzerland
[2] Univ Lausanne Hosp, Dept Radiotherapy, Lausanne, Switzerland
[3] Univ Lausanne Hosp, Dept Neuropathol, Lausanne, Switzerland
[4] Univ Lausanne Hosp, Multidisciplinary Oncol Ctr, Lausanne, Switzerland
[5] Univ Hosp Geneva, Dept Neurosurg, Geneva, Switzerland
[6] Swiss Inst Expt Canc Res, Natl Ctr Competence Res Mol Oncol, CH-1066 Epalinges, Switzerland
[7] Univ Bern, Inselspital, Dept Neurosurg, CH-3010 Bern, Switzerland
[8] European Org Res Treatment Canc, Ctr Data, Brussels, Belgium
[9] Univ Tubingen, Dept Neurol, D-7400 Tubingen, Germany
[10] Univ Regensburg, Dept Neurol, D-8400 Regensburg, Germany
[11] Univ Rotterdam Hosp, Div Neuropathol, Rotterdam, Netherlands
[12] Univ Med Ctr, Utrecht, Netherlands
[13] Med Univ Vienna, Inst Neurol, Vienna, Austria
[14] Princess Margaret Hosp, Toronto, ON M4X 1K9, Canada
[15] Univ Calgary, Calgary, AB, Canada