[1] Univ Rotterdam Hosp, Rotterdam Canc Ctr, Dept Neurooncol, NL-3008 AE Rotterdam, Netherlands
[2] Univ Rotterdam Hosp, Rotterdam Canc Ctr, Dept Pathol, NL-3008 AE Rotterdam, Netherlands
[3] Univ Rotterdam Hosp, Rotterdam Canc Ctr, Dept Oncol, NL-3008 AE Rotterdam, Netherlands
[4] Hop La Pitie Salpetriere, Federat Neurol Marazin, Paris, France
[5] Univ Padua, Azienda Osped, Div Med Oncol, I-35100 Padua, Italy
[6] Univ Med Ctr Utrecht, Dept Neurol, Utrecht, Netherlands