WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 1,2005, Pages 69-72,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 1,2005, Pages 84-88,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 1,2005, Pages 104-108,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 11, Issue 1,2005, Pages 89-93,