[1] UCL Inst Neurol, Queen Sq MS Ctr, London WC1N 3BG, England
[2] NIHR Univ Coll London Hosp Biomed Res Ctr, London, England
[3] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[4] Vrije Univ Amsterdam, Med Ctr, Dept Anat & Neurosci, Amsterdam, Netherlands
[5] Tech Univ Munich, Klinikum Rechts Isar, Dept Neurol, Munich, Germany
[6] Munich Cluster Syst Neurol SyNergy, Munich, Germany