WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 2,2004, Pages 287-291,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 2,2004, Pages 167-171,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 2,2004, Pages 177-181,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 2,2004, Pages 306-308,