[1] Ghent Univ Hosp, Dept Neurol, De Pintelaan 185, B-9000 Ghent, Belgium
[2] Antwerp Univ Hosp, Dept Neurol, Wilrijkstr 10, B-2650 Edegem, Belgium
[3] AZ Sint Jan Brugge Oostende, Dept Neurol, Ruddershove 10, B-8000 Brugge, Belgium
[4] AZ Sint Jan Brugge Oostende, Dept Hematol, Ruddershove 10, B-8000 Brugge, Belgium
[5] Vrije Univ Brussel, Univ Ziekenhuis Brussel, Ctr Neurosci, Dept Neurol, Brussels, Belgium
[6] UZ Brussel, Dept Hematol, Laarbeeklaan 101, B-1090 Brussels, Belgium
[7] UZ Leuven, Dept Neurol, Herestr 49, B-3000 Louvain, Belgium
[8] UZ Leuven, Dept Hematol, Herestr 49, B-3000 Louvain, Belgium
[9] Univ Libre Bruxelles, Hop Erasme, Serv Neurol, Unite Neuroimmunol, Brussels, Belgium
[10] Univ Libre Bruxelles, Hop Erasme, Dept Hematol, Brussels, Belgium
[11] Catholic Univ Louvain, Clin Univ St Luc, Dept Neurol, Ave Hippocrate 10, B-1200 Brussels, Belgium
[12] Catholic Univ Louvain, Clin Univ St Luc, Dept Hematol, Ave Hippocrate 10, B-1200 Brussels, Belgium
[13] Univ Hosp Liege, Dept Neurol, Rue Grandfosse 31-33, B-4130 Esneux, Belgium
[14] Univ Liege, CHU Sart Tilman, Dept Hematol, B-4000 Liege, Belgium
[15] Hasselt Univ, Biomed Inst, Agoralaan Gebouw A, B-3590 Diepenbeek, Belgium
[16] Rehabil & MS Ctr Overpelt, Agoralaan Gebouw A, B-3590 Diepenbeek, Belgium
[17] Jessa Ziekenhuis, Dept Hematol, Stadsomvaart 11, B-3500 Hasselt, Belgium
[18] Ghent Univ Hosp, Dept Hematol, De Pintelaan 185, B-9000 Ghent, Belgium
[19] Antwerp Univ Hosp, Dept Hematol, Wilrijkstr 10, B-2650 Edegem, Belgium