[1] Clin Univ Navarra, Lab Neuroimmunol, Dept Neurol, Pamplona 31008, Spain
[2] Hosp Valle De Hebron, Neuroimmunol Unit, Barcelona, Spain
[3] Univ Pompeu Fabra, Unitat Biol Evolut, Barcelona, Spain
[4] Hosp Clin San Carlos, Dept Immunol & Neurol, Madrid, Spain
[5] Hosp Donostia, Dept Neurol, San Sebastian, Spain
[6] CSIC, Inst Biomed Valencia, Valencia, Spain
[7] deCODE Inc, Reykjavik, Iceland
[8] Univ Cambridge, Addenbrookes Hosp, Neurol Unit, Cambridge CB2 2QQ, England
[9] Inst Publ Hlth, MRC Biostat Unit, Cambridge, England