WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 38,2006, Pages 6172-6177,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 38,2006, Pages 6167-6171,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 38,2006, Pages 6128-6132,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 12, Issue 38,2006, Pages 6182-6187,