- Correspondence to Professor P Brown, Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, Queen Square, London WCIN 3BG, UK;
- Received 4 August 2009
- Revised 18 November 2009
- Accepted 24 December 2009
- Published online 3 August 2010.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.