[1] Univ Basel Hosp, Dept Biomed, CH-4031 Basel, Switzerland
[2] Ruhr Univ Bochum, St Josef Hosp, Univ Clin Bochum, D-4630 Bochum, Germany
[3] UCL, Inst Neurol, London, England
[4] Gen Teaching Hosp, Prague, Czech Republic
[5] City Hosp Cologne, Cologne, Germany
[6] VU Med Ctr, Amsterdam, Netherlands
[7] Biogen Idec, Cambridge, MA USA
[8] Univ Istanbul, Istanbul, Turkey
[9] Charles Univ Prague, Sch Med 2, Motol Hosp, Prague, Czech Republic
[10] Masaryk Univ, Brno, Czech Republic