- Dr Hans Clusmann, Neurochirurgische Klinik, Sigmund-Freud-Strasse 25, D-53105 Bonn, Germany. Telephone 0049 228 287 6518; fax: 0049 228 287 4758.
- Received October 25, 1996
- Revised July 11, 1997
- Accepted July 14, 1997
- First published March 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.