- Dr T T Warner, University Department of Clinical Neurosciences, Royal Free Hospital School of Medicine, Rowland Hill Street, London NW3 2PF, UK.
- Received 21 November 1997
- Revised 9 February 1998
- Accepted 9 February 1998
- Published online 1 September 1998.
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.