WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 21,2004, Pages 3127-3131,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 21,2004, Pages 3194-3196,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 21,2004, Pages 3221-3224,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 21,2004, Pages 3081-3087,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 21,2004, Pages 3212-3214,