[1] Katholieke Univ Leuven, Rega Inst Med Res, Lab Mol Immunol, B-3000 Louvain, Belgium
[2] Karolinska Inst, Huddinge Univ Hosp, Dept Clin Neurosci, Div Neurol, Stockholm, Sweden
[3] Karolinska Hosp, Ctr Mol Med, Neuroimmunol Unit, S-10401 Stockholm, Sweden
[4] Univ Cagliari, Dept Neurosci, Cagliari, Italy