- Correspondence to: Dr B Ryan, Department of Gastroenterology, University Hospital Maastricht, PO Box 5800, 6202AZ, Maastricht, the Netherlands;
- Accepted April 30, 2002
- First published June 1, 2003.
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.