[1] Kuopio Univ Hosp, Neuroctr, Kuopio, Finland
[2] Helsinki Univ Hosp, Dept Neurol, Helsinki, Finland
[3] Helsinki Univ Hosp, Res Program, Unit Syst Oncol, Unit Coagulat Disorders, Helsinki, Finland
[4] Turku Univ Hosp, Div Clin Neurosci, Turku, Finland
[5] Univ Med, Dept Neurol, Greifswald, Germany
[6] Haukeland Hosp, Neurol, Bergen, Norway
[7] Istanbul Univ, Neurol, Istanbul, Turkey
[8] Azienda Unita Sanitaria Locale IRCCS Reggio Emili, Neuromotor Dept, Reggio Emilia, Italy
[9] Oulu Univ Hosp, Dept Neurol, Oulu, Finland
[10] Tampere Univ Hosp, Dept Neurosci & Rehabil, Tampere, Finland
[11] Univ Lisbon, Hosp Santa Maria, Dept Neurosci Neurol, Lisbon, Portugal
[12] Sahlgrens Univ Hosp, Clin Neurosci, Gothenburg, Sweden
[13] Radboud Univ Nijmegen, Med Ctr, Dept Neurol, Donders Inst Brain Cognit & Behav, Nijmegen, Netherlands
[14] Natl & Kapodistrian Univ Athens, Dept Neurol 2, Attikon Hosp, Sch Med, Athens, Greece
[15] Univ Brescia, Dept Clin & Expt Sci, Neurol Clin, Brescia, Italy
[16] Univ Tartu, Tartu, Estonia
[17] Tartu Univ Hosp, Dept Neurol & Neurosurg, Tartu, Estonia
[18] Vilnius Univ Hosp, Santaros Klinikos, Vilnius, Lithuania
[19] Royal Stoke Univ Hosp, Neurol, Stoke On Trent, Staffs, England
[20] Peterborough City Hosp, Neurol, Peterborough, England
[21] Charite Univ Med Berlin, Neurol, Berlin, Germany
[22] Maastricht Univ, Med Ctr, Cardiovasc Res Inst, Maastricht, Netherlands