[1] Aneurin Bevan Univ Hlth Board, Royal Gwent Hosp, Dept Neurol, Newport, Gwent, Wales
[2] Univ Hosp Wales, Helen Durham Ctr Neuroinflammatory Dis, Cardiff, S Glam, Wales
[3] CUBRIC, Cardiff, S Glam, Wales
[4] Cardiff Univ, Inst Psychol Med & Clin Neurosci, Cardiff, S Glam, Wales