[1] St James Univ Hosp, Leeds Inst Mol Med, Leeds LS9 7TF, W Yorkshire, England
[2] Univ Childrens Hosp, Heidelberg, Germany
[3] Fdn IRCCS, Ist Neurol C Besta, Dev Neurol Dept, Milan, Italy
[4] Univ Heidelberg Hosp, Dept Neuroradiol, Heidelberg, Germany
[5] Univ Chicago, Dept Human Genet, Chicago, IL 60637 USA
[6] Univ Chicago, Dept Neurol, Chicago, IL 60637 USA
[7] Univ Chicago, Dept Pediat, Chicago, IL 60637 USA
[8] Leeds Gen Infirm, Dept Pediat Neurol, Leeds, W Yorkshire, England
[9] St James Univ Hosp, Dept Clin Genet, Leeds LS9 7TF, W Yorkshire, England
[10] Hull Royal Infirm, Dept Neuropathol, Kingston Upon Hull HU3 2JZ, N Humberside, England
[11] Hull Royal Infirm, Dept Neuroradiol, Kingston Upon Hull HU3 2JZ, N Humberside, England
[12] John Radcliffe Hosp, Dept Neuropathol, Oxford OX3 9DU, England
[13] Frenchay Hosp, Dept Neuroradiol, Bristol BS16 1LE, Avon, England
[14] Univ Wales Hosp, Dept Med Genet, Cardiff CF4 4XW, S Glam, Wales
[15] St Marys Hosp, Acad Unit Med Genet, Manchester M13 0JH, Lancs, England