- Ms Helen Tremlett, Medicines Research Unit, University of Wales, Cardiff CF1 3XF, UK. Telephone 0044 1222 874783; fax 0044 1222 874535; email
- Received 18 December 1997
- Revised 9 March 1998
- Accepted 16 April 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.