[1] Univ Cambridge, Dept Clin Neurosci, Div Neurosurg, Cambridge, England
[2] Univ Warwick, Dept Psychol, Coventry, W Midlands, England
[3] Colchester Hosp Univ, East Suffolk & North Essex NHS Fdn Trust, Colchester, Essex, England
[4] Univ Bristol, Bristol Med Sch Populat Hlth Sci, Bristol, Avon, England
[5] Myelopathy Org, Myelopathy Support, Cambridge, England
[6] WT MRC Cambridge Stem Cell Inst, Anne McLaren Lab, Cambridge, England