[1] Kings Coll London, Inst Psychiat Psychol & Neurosci, London, England
[2] Kings Coll Hosp NHS Fdn Trust, Neurosci Clin Trials Unit, London, England
[3] Kings Coll Hosp NHS Fdn Trust, Dept Neurosurg, London, England
[4] Kings Coll Hosp NHS Fdn Trust, Dept Neurophysiol, London, England