[1] Univ Hosp Geneva, Dept Clin Neurosci, Div Neurol, Unit Neuroimmunol & Multiple Sclerosis, CH-1211 Geneva 4, Switzerland
[2] Univ Geneva, Fac Med, Geneva, Switzerland
[3] Univ Hosp Geneva, Dept Genet & Lab Med, Div Lab Med, CH-1211 Geneva 4, Switzerland
[4] Univ Hosp Geneva, Div Infect Dis, Lab Virol, CH-1211 Geneva 4, Switzerland
[5] Univ Geneva, Sch Med, CH-1211 Geneva, Switzerland
[6] CHU Vaudois, Dept Clin Neurosci, Div Neurol, CH-1011 Lausanne, Switzerland
[7] CHU Vaudois, Dept Med, Div Immunol & Allergy, CH-1011 Lausanne, Switzerland
[8] Vrije Univ Amsterdam, Med Ctr, Dept Radiol & Nucl Med, Amsterdam, Netherlands
[9] Vrije Univ Amsterdam, Med Ctr, IAC, Amsterdam, Netherlands
[10] Univ Hosp Geneva, Dept Imaging & Med Informat, CH-1211 Geneva 4, Switzerland