WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 4,2004, Pages 606-609,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 4,2004, Pages 471-475,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 4,2004, Pages 484-490,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 10, Issue 4,2004, Pages 594-597,