[1] Univ Hosp Verona, Dept Neurol & Movement Sci, Adv Neuroimaging Lab Neurol B, I-37134 Verona, Italy
[2] Univ London Imperial Coll Sci Technol & Med, Hammersmith Hosp, Fac Med, Div Brain Sci, London W12 0NN, England
[3] Ist Super Sanita, Department Cell Biol & Neurosci, I-00161 Rome, Italy
[4] UCL, Hosp NHS Fdn Trust NIHR UCL UCLH, Biomed Res Ctr, Natl Inst Hlth Res, London W1T 7DN, England
[5] UCL, Inst Neurol, Queen Sq Multiple Sclerosis Ctr, London WC1N 3BG, England
[6] Vrije Univ Amsterdam, Med Ctr, Dept Anat & Neurosci, Sect Clin Neurosci, NL-1081 BT Amsterdam, Netherlands
[7] Univ Zurich, Univ Zurich Hosp, Dept Neurol, Neuroimmunol & Multiple Sclerosis Res Sect, CH-8091 Zurich, Switzerland