- Dr Keith Brecher, Memorial Sloan-Kettering Cancer Center, Department of Neurology, 1275 York Avenue, New York, New York 10021, USA. Telephone 001 212 639 7047; fax 001 212 717 3551; email
- Received October 17, 1997
- Revised January 27, 1998
- Accepted January 30, 1998
- First published December 1, 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.