[1] Univ Munich, Interdisciplinary Palliat Care Unit, D-80539 Munich, Germany
[2] Univ Munich, Dept Neurol, D-80539 Munich, Germany
[3] Univ Sheffield, Dept Neurol, Sheffield S10 2TN, S Yorkshire, England
[4] Beaumont Hosp, Richmond Inst Neurol, Dublin 9, Ireland
[5] Univ Ulm, Dept Neurol, D-89069 Ulm, Germany
[6] Univ Lisbon, Dept Neurol, P-1699 Lisbon, Portugal
[7] Univ Milan, Maggiore Hosp, IRCCS, Dept Neurol Sci, I-20122 Milan, Italy
[8] Univ Milan, Sch Med, Ist Auxol Italiano, IRCCS, I-20122 Milan, Italy