[1] Univ Hosp North Midlands, Clin Neurophysiolgy, Stoke On Trent, Staffs, England
[2] Great Ormond St Hosp Sick Children, Clin Neurophysiol, London, England
[3] Great Ormond St Hosp Sick Children, Paediat Neurol, London, England
[4] UCL Great Ormond St Inst Child Hlth, Clin Neurosci, London, England