- Correspondence to: Professor A E Rosser, School of Biosciences, Cardiff University, Museum Avenue Box 911, Cardiff CF10 3US, UK;
- Received November 22, 2001
- Accepted July 16, 2002
- Revised July 15, 2002
- First published December 1, 2002.
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.