- Dr AG Demaine, Room 417 Davy Building, Plymouth Postgraduate Medical School, University of Plymouth, Plymouth PL4 8AA. Telephone 0044 1752 232965; fax 0044 1752 232927.
- Received May 22, 1997
- Revised August 22, 1997
- Accepted August 29, 1997
- First published February 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.