[1] Vrije Univ Amsterdam, Med Ctr, Dept Neurol, NL-1007 MB Amsterdam, Netherlands
[2] Med Ctr Haaglanden, Dept Neurol, NL-2501 CK The Hague, Netherlands
[3] Vrije Univ Amsterdam, Med Ctr, EMGO Inst Hlth & Care Res, Dept Publ & Occupat Hlth, NL-1007 MB Amsterdam, Netherlands
[4] Vrije Univ Brussel, End Of Life Care Res Grp, B-1090 Brussels, Belgium
[5] Univ Ghent, B-1090 Brussels, Belgium
[6] Western Gen Hosp, ECNO, Edinburgh EH4 2XU, Midlothian, Scotland
[7] Kaiser Franz Joseph Hosp, Dept Neurol, A-1100 Vienna, Austria
[8] Tyrolean Hosp Commun, Hosp & Palliat Care Unit, A-6020 Innsbruck, Austria
[9] Med Univ Innsbruck, Dept Neurol, Neurooncol Grp, A-6020 Innsbruck, Austria
[10] Landesklinikum St Polten, Dept Neurol, A-3100 St Polten, Austria
[11] Med Univ Vienna, Dept Med 1, Austria Comprehens Canc Ctr Cent Nervous Syst Tum, A-1090 Vienna, Austria