- Correspondence to:
Professor G-Z Pan
Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Beijing 100730, The People’s Republic of China;
- Accepted January 6, 2004
- First published July 9, 2004.
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.