Authors: Simon Mead; Mark Poulter; James Uphill; John Beck; Jerome Whitfield; Thomas E F Webb; Tracy Campbell; Gary Adamson; Pelagia Deriziotis; Sarah J Tabrizi; Holger Hummerich; Claudio Verzilli; Michael P Alpers; John C Whittaker; John Collinge Journal: Lancet Neurol Date: 2009-01 Impact factor: 44.182