[1] Univ Geneva, Fac Med, CH-1211 Geneva 4, Switzerland
[2] Univ Hosp, Hans Wilsdorf Lab, Clin Immunol Unit, Div Immunol & Allergy, Geneva, Switzerland
[3] Univ Calif San Francisco, Dept Neurol, San Francisco, CA 94143 USA
[4] Univ Calif San Francisco, Program Immunol, San Francisco, CA 94143 USA
[5] Univ Hosp Geneva, Neuroimmunol Lab, Div Neurol, Dept Neurosci, Geneva, Switzerland
[6] Fac Med, Dept Pathol & Immunol, Geneva, Switzerland