[1] Vall dHebron Univ Hosp, Multiple Sclerosis Ctr Catalonia, Dept Neuroimmunol, Barcelona, Spain
[2] VHIR, Barcelona, Spain
[3] Univ Pompeu Fabra, Prote Unit CRG, Barcelona, Spain
[4] Purdue Univ, Dept Stat, W Lafayette, IN 47907 USA
[5] Hosp Ramon & Cajal, E-28034 Madrid, Spain
[6] Univ Pompeu Fabra, Barcelona, Spain